AEC Environmental A EN LOr ll IN CgtMlAN
CONSTRUCTION ENVIRONMENT AL MANAGEMENT PLAN
AUDIT AREA 1 PORTION OF FORMER HILLS INDUSTRIES SITE
CORNER OF SOUTH ROAD amp ACKLAND STREET EDWARDSTOWN
SOUTH AUSTRALIA
Prepared for
Novion Property Group (formerly Colonial First State Global Asset Management)
Date September 2015 Reference No 3698
Report Version 3698AA1CEMP01
Prepared by Greencap (formerly AEC Environmental Pty Ltd)
AEC ENVIRONMENTA L PTY l T D
12 Greenhill Road Wayville SA 5034 P 0 Box 582 Unley SA 5061 Ph 08 8299 9955 Fax 08 8299 9954 Email aecaecaustcomau Web wwwaecaustcomau
AEC Environmental AGREENCAP CONSULTING COMlAr
AEC Document Control
Report Title amp AEC Job Refmiddot
Construction Environmental Management Plan
Audit Area 1 Portion of Former Hills Industries
Site Comer of South Road and Ackland Street
Edwardstown South Australia
(AEC Ref 3698AA1CEMP01)
Filenameshy
3698 Audiit Area 1 CEMP
Written
Dylan Burford
Environmental Services Manager
Approved
Nick Waniarcha
Regional Operations Manager
Rev No Status Date Author(s) Reviewer(s)
Draft v1 Draft 27022015 DB NW
Draft v2 Draft 23062015 DB NW
Final v1 Final 30092015 DB NW
Rev No Copies Recipient
1 1 x electronic ERM Novion
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TABLE OF CONTENTS
10 INTRODUCTION 4
11 Objectives 4
12 Applicable Environmental Legislation Licensing Guidelines and Standards 4
20 SITE IDENTIFICATION 11
21 Location 11
22 Legal Description 11
23 Site Description amp Current Land Use 12
24 Surrounding Land Use 12
25 Proposed Land Use 13
26 Geology amp Hydrogeology 14
30 BACKGROUND 17
31 List of Previous Reports 17
32 Background Information 18
40 SOIL REMEDIATION WORKS 24
41 Completed Remediation Works 24
42 Post-Remediation Site Condition 27
50 CEMP IMPLEMENTATION amp MANAGEMENT 42
51 CEMP Requirements 42
52 Roles and Responsibilities 42
53 Inductions Training amp Meetings 45
54 Inspection Auditing and Incident Response 46
55 Timing 48
56 Communications 48
57 Emergency Response 49
58 Document Control 49
60 ENVIRONMENTAL ASSESSMENT 50
61 Environmental Objectives 50
62 Environmental amp Human Health Risk Assessment 51
70 MANAGEMENT STRATEGIES 56
71 Soil Management 56
72 Groundwater Management 67
73 Air Quality (Vapour) Management 67
74 Stormwater Management 68
80 REFERENCES 69
90 LIMITATIONS OF THIS REPORT 70
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REPORT ATTA CHMENTS
FIGURES
Figure A
Figure B
Figure C
APPENDICES
Appendix A
HILHSL B Exceedances over Proposed Development Plan
Soil Management Types
Land Use Areas
Asbestos Management Measures
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10 INTRODUCTION
AEC Environmental Pty Ltd (AEC) has been engaged by Novion Property Group (formerly Colonial First State Global Management) to prepare a Construction Environmental Management Plan (CEMP) for a portion of the former Hills Industries site located on South Road Edwardstown Following the completion of a Detailed Risk Assessment and Remediation Options Assessment (ROA) for the site a recommendation to complete a CEMP was made
The former Hills Industries site comprises an irregular shaped block of approximately 778 hectares described by 20 Certificates of Title containing 29 individual allotments The site is in the process of being re-zoned for mixed use it is likely that at least part of the site will be redeveloped for ongoing commercial I industrial use within the footprint of the proposed extension of the Castle Plaza shopping Centre
For reporting purposes and to align with the proposed development plan the entire former Hills Industries site has been split into three assessment areas each of which is under statutory audit
bull Audit Area 1 - Comprises 7 Certificates of Title including Allotment 288 in which the vast majority of past operations were undertaken Assessment and remediation works are documented within this report (Audited by Mr Warren Pump)
bull Audit Area 2 - Comprises 12 Certificates of Title Assessment and remediation works are documented under separate cover (Audited by Mr Paul Fridell) and
bull Audit Area 3 - Comprises nine allotments in two areas (Mixed Use Area 1 and Mixed Use Area 2) with an area of 1184 hectares Assessment and remediation works are
documented under separate cover (Audited by Mr Paul Fridell)
A plan showing the location of each Audit Area is presented in Section 22 This report pertains to Audit Area 1 and has been prepared for review by Mr Warren Pump
11 Objectives
The purpose of the CEMP is to facilitate the management of impacted soils and works in areas under which contaminated groundwater is present The CEMP identifies restrictions relating to site use material re-use and presents mitigation measures to reduce potential environmental and health risks that may occur as a result of civil and associated earthworks
12 Applicable Environmental Legislation Licensing Guidelines and Standards
Key legislation regulations guidelines and standards relevant to the civil and construction works
for the redevelopment are detailed in Table 1
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Table 1 - Key Legislation and Guidance
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Air Quality Environment Protection Act 1993
Environment Protection (Air Quality) Policy 1994
Climate Change and Greenhouse Emissions Reduction Act 2007
NEPC National Environment Protection (Ambient Air Quality) Measure 1998 (as amended May 2003)
NEPC National Environment Protection (Diesel Vehicle Emissions) Measure 2001
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
SA EPA Handbook for Pollution Avoidance on
Commercial and Residential Building Sites - Second
Edition 2004
Asbestos National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Safe Work Australia Act 2008
Work Health and Safety Regulations 2012 Code of Practice for the Management and Control of Asbestos in Workplaces [NOHSC 2018 (2005)]
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Safe Work Australia Code of Practice - How to Manage and Control Asbestos in the Workplace 2011
Cultural and Native Title Act 1993 Aboriginal Heritage Act 1988 Commonwealth Heritage List Heritage
Heritage Places Act 1993 National Heritage List
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Dangerous Road Transport Reform Dangerous Substances Act 1979 Code of Practice for stormwater pollution prevention Goods (Dangerous Goods) Act 1995
Dangerous Substances Regulations 2002
Dangerous Goods Transport Regulations 2008
(1997)
IATA Dangerous Goods Regulations
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
Safe Work Australia Code of Practice - Labelling of Workplace Hazardous Chemicals 2011
Safe Work Australia Code of Practice - Managing Risks of Hazardous Chemicals in the Workplace 2012
Flora amp Fauna Environment Protection and Biodiversity Conservation (EPBC) Act 1999
Threatened Species Conservation Act 1995
Development Regulations 2008
Environment Protection Act 1993
National Parks and Wildlife Act 1972
Native Vegetation Act 1991
Native Vegetation Regulations 2003
City of Marion Regulated amp significant Trees guidance
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Groundwater National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Site Contamination shyNotification of site contamination that affects or threatens underground water pursuant to section 83A of the Environment Protection Act 1993 (EPA 83708) 2008
SA EPA Guidelines for the assessment and remediation of groundwater contamination 2009
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Odour Environment Protection Act 1993 SA EPA Odour assessment using odour source modelling Guideline (EPA 37307) 2007
Noise amp Vibration Environment Protection Act 1993
Environment Protection (Noise) Policy 2007
Guidelines for the use of the Environment Protection (Noise) Policy 2007
Australian Standard AS 1055-1997 Acoustics shyDescription and measurement of environmental noise
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
Safe Work Australia Code of Practice - Managing Noise and Preventing Hearing Loss at Work 2011
Public Health amp
Safety Public Health Act 2011
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Soil (erosion) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
Code of Practice for stormwater pollution prevention (1997)
Soil (imported) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
Soil (insitu) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Standard for the production and use of Waste Derived Fill 2013
Traffic Road Traffic Act 1961
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
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Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
20
AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
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bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
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AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental AGREENCAP CONSULTING COMlAr
AEC Document Control
Report Title amp AEC Job Refmiddot
Construction Environmental Management Plan
Audit Area 1 Portion of Former Hills Industries
Site Comer of South Road and Ackland Street
Edwardstown South Australia
(AEC Ref 3698AA1CEMP01)
Filenameshy
3698 Audiit Area 1 CEMP
Written
Dylan Burford
Environmental Services Manager
Approved
Nick Waniarcha
Regional Operations Manager
Rev No Status Date Author(s) Reviewer(s)
Draft v1 Draft 27022015 DB NW
Draft v2 Draft 23062015 DB NW
Final v1 Final 30092015 DB NW
Rev No Copies Recipient
1 1 x electronic ERM Novion
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AEC Environmental AGREENCAP CONSULTING COMlAr
TABLE OF CONTENTS
10 INTRODUCTION 4
11 Objectives 4
12 Applicable Environmental Legislation Licensing Guidelines and Standards 4
20 SITE IDENTIFICATION 11
21 Location 11
22 Legal Description 11
23 Site Description amp Current Land Use 12
24 Surrounding Land Use 12
25 Proposed Land Use 13
26 Geology amp Hydrogeology 14
30 BACKGROUND 17
31 List of Previous Reports 17
32 Background Information 18
40 SOIL REMEDIATION WORKS 24
41 Completed Remediation Works 24
42 Post-Remediation Site Condition 27
50 CEMP IMPLEMENTATION amp MANAGEMENT 42
51 CEMP Requirements 42
52 Roles and Responsibilities 42
53 Inductions Training amp Meetings 45
54 Inspection Auditing and Incident Response 46
55 Timing 48
56 Communications 48
57 Emergency Response 49
58 Document Control 49
60 ENVIRONMENTAL ASSESSMENT 50
61 Environmental Objectives 50
62 Environmental amp Human Health Risk Assessment 51
70 MANAGEMENT STRATEGIES 56
71 Soil Management 56
72 Groundwater Management 67
73 Air Quality (Vapour) Management 67
74 Stormwater Management 68
80 REFERENCES 69
90 LIMITATIONS OF THIS REPORT 70
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AEC Environmental AGREENCAP CONSULTING COMlAr
REPORT ATTA CHMENTS
FIGURES
Figure A
Figure B
Figure C
APPENDICES
Appendix A
HILHSL B Exceedances over Proposed Development Plan
Soil Management Types
Land Use Areas
Asbestos Management Measures
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AEC Environmental A EN A CONSULTING COMPAt
10 INTRODUCTION
AEC Environmental Pty Ltd (AEC) has been engaged by Novion Property Group (formerly Colonial First State Global Management) to prepare a Construction Environmental Management Plan (CEMP) for a portion of the former Hills Industries site located on South Road Edwardstown Following the completion of a Detailed Risk Assessment and Remediation Options Assessment (ROA) for the site a recommendation to complete a CEMP was made
The former Hills Industries site comprises an irregular shaped block of approximately 778 hectares described by 20 Certificates of Title containing 29 individual allotments The site is in the process of being re-zoned for mixed use it is likely that at least part of the site will be redeveloped for ongoing commercial I industrial use within the footprint of the proposed extension of the Castle Plaza shopping Centre
For reporting purposes and to align with the proposed development plan the entire former Hills Industries site has been split into three assessment areas each of which is under statutory audit
bull Audit Area 1 - Comprises 7 Certificates of Title including Allotment 288 in which the vast majority of past operations were undertaken Assessment and remediation works are documented within this report (Audited by Mr Warren Pump)
bull Audit Area 2 - Comprises 12 Certificates of Title Assessment and remediation works are documented under separate cover (Audited by Mr Paul Fridell) and
bull Audit Area 3 - Comprises nine allotments in two areas (Mixed Use Area 1 and Mixed Use Area 2) with an area of 1184 hectares Assessment and remediation works are
documented under separate cover (Audited by Mr Paul Fridell)
A plan showing the location of each Audit Area is presented in Section 22 This report pertains to Audit Area 1 and has been prepared for review by Mr Warren Pump
11 Objectives
The purpose of the CEMP is to facilitate the management of impacted soils and works in areas under which contaminated groundwater is present The CEMP identifies restrictions relating to site use material re-use and presents mitigation measures to reduce potential environmental and health risks that may occur as a result of civil and associated earthworks
12 Applicable Environmental Legislation Licensing Guidelines and Standards
Key legislation regulations guidelines and standards relevant to the civil and construction works
for the redevelopment are detailed in Table 1
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 1 - Key Legislation and Guidance
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Air Quality Environment Protection Act 1993
Environment Protection (Air Quality) Policy 1994
Climate Change and Greenhouse Emissions Reduction Act 2007
NEPC National Environment Protection (Ambient Air Quality) Measure 1998 (as amended May 2003)
NEPC National Environment Protection (Diesel Vehicle Emissions) Measure 2001
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
SA EPA Handbook for Pollution Avoidance on
Commercial and Residential Building Sites - Second
Edition 2004
Asbestos National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Safe Work Australia Act 2008
Work Health and Safety Regulations 2012 Code of Practice for the Management and Control of Asbestos in Workplaces [NOHSC 2018 (2005)]
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Safe Work Australia Code of Practice - How to Manage and Control Asbestos in the Workplace 2011
Cultural and Native Title Act 1993 Aboriginal Heritage Act 1988 Commonwealth Heritage List Heritage
Heritage Places Act 1993 National Heritage List
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Dangerous Road Transport Reform Dangerous Substances Act 1979 Code of Practice for stormwater pollution prevention Goods (Dangerous Goods) Act 1995
Dangerous Substances Regulations 2002
Dangerous Goods Transport Regulations 2008
(1997)
IATA Dangerous Goods Regulations
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
Safe Work Australia Code of Practice - Labelling of Workplace Hazardous Chemicals 2011
Safe Work Australia Code of Practice - Managing Risks of Hazardous Chemicals in the Workplace 2012
Flora amp Fauna Environment Protection and Biodiversity Conservation (EPBC) Act 1999
Threatened Species Conservation Act 1995
Development Regulations 2008
Environment Protection Act 1993
National Parks and Wildlife Act 1972
Native Vegetation Act 1991
Native Vegetation Regulations 2003
City of Marion Regulated amp significant Trees guidance
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Groundwater National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Site Contamination shyNotification of site contamination that affects or threatens underground water pursuant to section 83A of the Environment Protection Act 1993 (EPA 83708) 2008
SA EPA Guidelines for the assessment and remediation of groundwater contamination 2009
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Odour Environment Protection Act 1993 SA EPA Odour assessment using odour source modelling Guideline (EPA 37307) 2007
Noise amp Vibration Environment Protection Act 1993
Environment Protection (Noise) Policy 2007
Guidelines for the use of the Environment Protection (Noise) Policy 2007
Australian Standard AS 1055-1997 Acoustics shyDescription and measurement of environmental noise
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
Safe Work Australia Code of Practice - Managing Noise and Preventing Hearing Loss at Work 2011
Public Health amp
Safety Public Health Act 2011
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Soil (erosion) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
Code of Practice for stormwater pollution prevention (1997)
Soil (imported) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
Soil (insitu) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Standard for the production and use of Waste Derived Fill 2013
Traffic Road Traffic Act 1961
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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AEC Environmental AGREENCAP CONSULTING COMlAr
26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
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AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
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bullbullbull bullbullbullbullbullbull
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Monitoring Well Location I __ t
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ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
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----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
27
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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TABLE OF CONTENTS
10 INTRODUCTION 4
11 Objectives 4
12 Applicable Environmental Legislation Licensing Guidelines and Standards 4
20 SITE IDENTIFICATION 11
21 Location 11
22 Legal Description 11
23 Site Description amp Current Land Use 12
24 Surrounding Land Use 12
25 Proposed Land Use 13
26 Geology amp Hydrogeology 14
30 BACKGROUND 17
31 List of Previous Reports 17
32 Background Information 18
40 SOIL REMEDIATION WORKS 24
41 Completed Remediation Works 24
42 Post-Remediation Site Condition 27
50 CEMP IMPLEMENTATION amp MANAGEMENT 42
51 CEMP Requirements 42
52 Roles and Responsibilities 42
53 Inductions Training amp Meetings 45
54 Inspection Auditing and Incident Response 46
55 Timing 48
56 Communications 48
57 Emergency Response 49
58 Document Control 49
60 ENVIRONMENTAL ASSESSMENT 50
61 Environmental Objectives 50
62 Environmental amp Human Health Risk Assessment 51
70 MANAGEMENT STRATEGIES 56
71 Soil Management 56
72 Groundwater Management 67
73 Air Quality (Vapour) Management 67
74 Stormwater Management 68
80 REFERENCES 69
90 LIMITATIONS OF THIS REPORT 70
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REPORT ATTA CHMENTS
FIGURES
Figure A
Figure B
Figure C
APPENDICES
Appendix A
HILHSL B Exceedances over Proposed Development Plan
Soil Management Types
Land Use Areas
Asbestos Management Measures
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10 INTRODUCTION
AEC Environmental Pty Ltd (AEC) has been engaged by Novion Property Group (formerly Colonial First State Global Management) to prepare a Construction Environmental Management Plan (CEMP) for a portion of the former Hills Industries site located on South Road Edwardstown Following the completion of a Detailed Risk Assessment and Remediation Options Assessment (ROA) for the site a recommendation to complete a CEMP was made
The former Hills Industries site comprises an irregular shaped block of approximately 778 hectares described by 20 Certificates of Title containing 29 individual allotments The site is in the process of being re-zoned for mixed use it is likely that at least part of the site will be redeveloped for ongoing commercial I industrial use within the footprint of the proposed extension of the Castle Plaza shopping Centre
For reporting purposes and to align with the proposed development plan the entire former Hills Industries site has been split into three assessment areas each of which is under statutory audit
bull Audit Area 1 - Comprises 7 Certificates of Title including Allotment 288 in which the vast majority of past operations were undertaken Assessment and remediation works are documented within this report (Audited by Mr Warren Pump)
bull Audit Area 2 - Comprises 12 Certificates of Title Assessment and remediation works are documented under separate cover (Audited by Mr Paul Fridell) and
bull Audit Area 3 - Comprises nine allotments in two areas (Mixed Use Area 1 and Mixed Use Area 2) with an area of 1184 hectares Assessment and remediation works are
documented under separate cover (Audited by Mr Paul Fridell)
A plan showing the location of each Audit Area is presented in Section 22 This report pertains to Audit Area 1 and has been prepared for review by Mr Warren Pump
11 Objectives
The purpose of the CEMP is to facilitate the management of impacted soils and works in areas under which contaminated groundwater is present The CEMP identifies restrictions relating to site use material re-use and presents mitigation measures to reduce potential environmental and health risks that may occur as a result of civil and associated earthworks
12 Applicable Environmental Legislation Licensing Guidelines and Standards
Key legislation regulations guidelines and standards relevant to the civil and construction works
for the redevelopment are detailed in Table 1
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Table 1 - Key Legislation and Guidance
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Air Quality Environment Protection Act 1993
Environment Protection (Air Quality) Policy 1994
Climate Change and Greenhouse Emissions Reduction Act 2007
NEPC National Environment Protection (Ambient Air Quality) Measure 1998 (as amended May 2003)
NEPC National Environment Protection (Diesel Vehicle Emissions) Measure 2001
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
SA EPA Handbook for Pollution Avoidance on
Commercial and Residential Building Sites - Second
Edition 2004
Asbestos National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Safe Work Australia Act 2008
Work Health and Safety Regulations 2012 Code of Practice for the Management and Control of Asbestos in Workplaces [NOHSC 2018 (2005)]
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Safe Work Australia Code of Practice - How to Manage and Control Asbestos in the Workplace 2011
Cultural and Native Title Act 1993 Aboriginal Heritage Act 1988 Commonwealth Heritage List Heritage
Heritage Places Act 1993 National Heritage List
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Dangerous Road Transport Reform Dangerous Substances Act 1979 Code of Practice for stormwater pollution prevention Goods (Dangerous Goods) Act 1995
Dangerous Substances Regulations 2002
Dangerous Goods Transport Regulations 2008
(1997)
IATA Dangerous Goods Regulations
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
Safe Work Australia Code of Practice - Labelling of Workplace Hazardous Chemicals 2011
Safe Work Australia Code of Practice - Managing Risks of Hazardous Chemicals in the Workplace 2012
Flora amp Fauna Environment Protection and Biodiversity Conservation (EPBC) Act 1999
Threatened Species Conservation Act 1995
Development Regulations 2008
Environment Protection Act 1993
National Parks and Wildlife Act 1972
Native Vegetation Act 1991
Native Vegetation Regulations 2003
City of Marion Regulated amp significant Trees guidance
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Groundwater National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Site Contamination shyNotification of site contamination that affects or threatens underground water pursuant to section 83A of the Environment Protection Act 1993 (EPA 83708) 2008
SA EPA Guidelines for the assessment and remediation of groundwater contamination 2009
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Odour Environment Protection Act 1993 SA EPA Odour assessment using odour source modelling Guideline (EPA 37307) 2007
Noise amp Vibration Environment Protection Act 1993
Environment Protection (Noise) Policy 2007
Guidelines for the use of the Environment Protection (Noise) Policy 2007
Australian Standard AS 1055-1997 Acoustics shyDescription and measurement of environmental noise
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
Safe Work Australia Code of Practice - Managing Noise and Preventing Hearing Loss at Work 2011
Public Health amp
Safety Public Health Act 2011
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Soil (erosion) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
Code of Practice for stormwater pollution prevention (1997)
Soil (imported) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
Soil (insitu) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Standard for the production and use of Waste Derived Fill 2013
Traffic Road Traffic Act 1961
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
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Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
20
AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
24
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
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bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental AGREENCAP CONSULTING COMlAr
REPORT ATTA CHMENTS
FIGURES
Figure A
Figure B
Figure C
APPENDICES
Appendix A
HILHSL B Exceedances over Proposed Development Plan
Soil Management Types
Land Use Areas
Asbestos Management Measures
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AEC Environmental A EN A CONSULTING COMPAt
10 INTRODUCTION
AEC Environmental Pty Ltd (AEC) has been engaged by Novion Property Group (formerly Colonial First State Global Management) to prepare a Construction Environmental Management Plan (CEMP) for a portion of the former Hills Industries site located on South Road Edwardstown Following the completion of a Detailed Risk Assessment and Remediation Options Assessment (ROA) for the site a recommendation to complete a CEMP was made
The former Hills Industries site comprises an irregular shaped block of approximately 778 hectares described by 20 Certificates of Title containing 29 individual allotments The site is in the process of being re-zoned for mixed use it is likely that at least part of the site will be redeveloped for ongoing commercial I industrial use within the footprint of the proposed extension of the Castle Plaza shopping Centre
For reporting purposes and to align with the proposed development plan the entire former Hills Industries site has been split into three assessment areas each of which is under statutory audit
bull Audit Area 1 - Comprises 7 Certificates of Title including Allotment 288 in which the vast majority of past operations were undertaken Assessment and remediation works are documented within this report (Audited by Mr Warren Pump)
bull Audit Area 2 - Comprises 12 Certificates of Title Assessment and remediation works are documented under separate cover (Audited by Mr Paul Fridell) and
bull Audit Area 3 - Comprises nine allotments in two areas (Mixed Use Area 1 and Mixed Use Area 2) with an area of 1184 hectares Assessment and remediation works are
documented under separate cover (Audited by Mr Paul Fridell)
A plan showing the location of each Audit Area is presented in Section 22 This report pertains to Audit Area 1 and has been prepared for review by Mr Warren Pump
11 Objectives
The purpose of the CEMP is to facilitate the management of impacted soils and works in areas under which contaminated groundwater is present The CEMP identifies restrictions relating to site use material re-use and presents mitigation measures to reduce potential environmental and health risks that may occur as a result of civil and associated earthworks
12 Applicable Environmental Legislation Licensing Guidelines and Standards
Key legislation regulations guidelines and standards relevant to the civil and construction works
for the redevelopment are detailed in Table 1
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 1 - Key Legislation and Guidance
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Air Quality Environment Protection Act 1993
Environment Protection (Air Quality) Policy 1994
Climate Change and Greenhouse Emissions Reduction Act 2007
NEPC National Environment Protection (Ambient Air Quality) Measure 1998 (as amended May 2003)
NEPC National Environment Protection (Diesel Vehicle Emissions) Measure 2001
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
SA EPA Handbook for Pollution Avoidance on
Commercial and Residential Building Sites - Second
Edition 2004
Asbestos National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Safe Work Australia Act 2008
Work Health and Safety Regulations 2012 Code of Practice for the Management and Control of Asbestos in Workplaces [NOHSC 2018 (2005)]
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Safe Work Australia Code of Practice - How to Manage and Control Asbestos in the Workplace 2011
Cultural and Native Title Act 1993 Aboriginal Heritage Act 1988 Commonwealth Heritage List Heritage
Heritage Places Act 1993 National Heritage List
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Dangerous Road Transport Reform Dangerous Substances Act 1979 Code of Practice for stormwater pollution prevention Goods (Dangerous Goods) Act 1995
Dangerous Substances Regulations 2002
Dangerous Goods Transport Regulations 2008
(1997)
IATA Dangerous Goods Regulations
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
Safe Work Australia Code of Practice - Labelling of Workplace Hazardous Chemicals 2011
Safe Work Australia Code of Practice - Managing Risks of Hazardous Chemicals in the Workplace 2012
Flora amp Fauna Environment Protection and Biodiversity Conservation (EPBC) Act 1999
Threatened Species Conservation Act 1995
Development Regulations 2008
Environment Protection Act 1993
National Parks and Wildlife Act 1972
Native Vegetation Act 1991
Native Vegetation Regulations 2003
City of Marion Regulated amp significant Trees guidance
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Groundwater National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Site Contamination shyNotification of site contamination that affects or threatens underground water pursuant to section 83A of the Environment Protection Act 1993 (EPA 83708) 2008
SA EPA Guidelines for the assessment and remediation of groundwater contamination 2009
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Odour Environment Protection Act 1993 SA EPA Odour assessment using odour source modelling Guideline (EPA 37307) 2007
Noise amp Vibration Environment Protection Act 1993
Environment Protection (Noise) Policy 2007
Guidelines for the use of the Environment Protection (Noise) Policy 2007
Australian Standard AS 1055-1997 Acoustics shyDescription and measurement of environmental noise
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
Safe Work Australia Code of Practice - Managing Noise and Preventing Hearing Loss at Work 2011
Public Health amp
Safety Public Health Act 2011
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Soil (erosion) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
Code of Practice for stormwater pollution prevention (1997)
Soil (imported) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
Soil (insitu) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Standard for the production and use of Waste Derived Fill 2013
Traffic Road Traffic Act 1961
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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AEC Environmental AGREENCAP CONSULTING COMlAr
26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
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AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
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Monitoring Well Location I __ t
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w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
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----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
24
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental A EN A CONSULTING COMPAt
10 INTRODUCTION
AEC Environmental Pty Ltd (AEC) has been engaged by Novion Property Group (formerly Colonial First State Global Management) to prepare a Construction Environmental Management Plan (CEMP) for a portion of the former Hills Industries site located on South Road Edwardstown Following the completion of a Detailed Risk Assessment and Remediation Options Assessment (ROA) for the site a recommendation to complete a CEMP was made
The former Hills Industries site comprises an irregular shaped block of approximately 778 hectares described by 20 Certificates of Title containing 29 individual allotments The site is in the process of being re-zoned for mixed use it is likely that at least part of the site will be redeveloped for ongoing commercial I industrial use within the footprint of the proposed extension of the Castle Plaza shopping Centre
For reporting purposes and to align with the proposed development plan the entire former Hills Industries site has been split into three assessment areas each of which is under statutory audit
bull Audit Area 1 - Comprises 7 Certificates of Title including Allotment 288 in which the vast majority of past operations were undertaken Assessment and remediation works are documented within this report (Audited by Mr Warren Pump)
bull Audit Area 2 - Comprises 12 Certificates of Title Assessment and remediation works are documented under separate cover (Audited by Mr Paul Fridell) and
bull Audit Area 3 - Comprises nine allotments in two areas (Mixed Use Area 1 and Mixed Use Area 2) with an area of 1184 hectares Assessment and remediation works are
documented under separate cover (Audited by Mr Paul Fridell)
A plan showing the location of each Audit Area is presented in Section 22 This report pertains to Audit Area 1 and has been prepared for review by Mr Warren Pump
11 Objectives
The purpose of the CEMP is to facilitate the management of impacted soils and works in areas under which contaminated groundwater is present The CEMP identifies restrictions relating to site use material re-use and presents mitigation measures to reduce potential environmental and health risks that may occur as a result of civil and associated earthworks
12 Applicable Environmental Legislation Licensing Guidelines and Standards
Key legislation regulations guidelines and standards relevant to the civil and construction works
for the redevelopment are detailed in Table 1
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Table 1 - Key Legislation and Guidance
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Air Quality Environment Protection Act 1993
Environment Protection (Air Quality) Policy 1994
Climate Change and Greenhouse Emissions Reduction Act 2007
NEPC National Environment Protection (Ambient Air Quality) Measure 1998 (as amended May 2003)
NEPC National Environment Protection (Diesel Vehicle Emissions) Measure 2001
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
SA EPA Handbook for Pollution Avoidance on
Commercial and Residential Building Sites - Second
Edition 2004
Asbestos National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Safe Work Australia Act 2008
Work Health and Safety Regulations 2012 Code of Practice for the Management and Control of Asbestos in Workplaces [NOHSC 2018 (2005)]
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Safe Work Australia Code of Practice - How to Manage and Control Asbestos in the Workplace 2011
Cultural and Native Title Act 1993 Aboriginal Heritage Act 1988 Commonwealth Heritage List Heritage
Heritage Places Act 1993 National Heritage List
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Dangerous Road Transport Reform Dangerous Substances Act 1979 Code of Practice for stormwater pollution prevention Goods (Dangerous Goods) Act 1995
Dangerous Substances Regulations 2002
Dangerous Goods Transport Regulations 2008
(1997)
IATA Dangerous Goods Regulations
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
Safe Work Australia Code of Practice - Labelling of Workplace Hazardous Chemicals 2011
Safe Work Australia Code of Practice - Managing Risks of Hazardous Chemicals in the Workplace 2012
Flora amp Fauna Environment Protection and Biodiversity Conservation (EPBC) Act 1999
Threatened Species Conservation Act 1995
Development Regulations 2008
Environment Protection Act 1993
National Parks and Wildlife Act 1972
Native Vegetation Act 1991
Native Vegetation Regulations 2003
City of Marion Regulated amp significant Trees guidance
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Groundwater National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Site Contamination shyNotification of site contamination that affects or threatens underground water pursuant to section 83A of the Environment Protection Act 1993 (EPA 83708) 2008
SA EPA Guidelines for the assessment and remediation of groundwater contamination 2009
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Odour Environment Protection Act 1993 SA EPA Odour assessment using odour source modelling Guideline (EPA 37307) 2007
Noise amp Vibration Environment Protection Act 1993
Environment Protection (Noise) Policy 2007
Guidelines for the use of the Environment Protection (Noise) Policy 2007
Australian Standard AS 1055-1997 Acoustics shyDescription and measurement of environmental noise
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
Safe Work Australia Code of Practice - Managing Noise and Preventing Hearing Loss at Work 2011
Public Health amp
Safety Public Health Act 2011
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Soil (erosion) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
Code of Practice for stormwater pollution prevention (1997)
Soil (imported) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
Soil (insitu) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Standard for the production and use of Waste Derived Fill 2013
Traffic Road Traffic Act 1961
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
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Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
20
AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
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bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
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AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 1 - Key Legislation and Guidance
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Air Quality Environment Protection Act 1993
Environment Protection (Air Quality) Policy 1994
Climate Change and Greenhouse Emissions Reduction Act 2007
NEPC National Environment Protection (Ambient Air Quality) Measure 1998 (as amended May 2003)
NEPC National Environment Protection (Diesel Vehicle Emissions) Measure 2001
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
SA EPA Handbook for Pollution Avoidance on
Commercial and Residential Building Sites - Second
Edition 2004
Asbestos National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Safe Work Australia Act 2008
Work Health and Safety Regulations 2012 Code of Practice for the Management and Control of Asbestos in Workplaces [NOHSC 2018 (2005)]
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Safe Work Australia Code of Practice - How to Manage and Control Asbestos in the Workplace 2011
Cultural and Native Title Act 1993 Aboriginal Heritage Act 1988 Commonwealth Heritage List Heritage
Heritage Places Act 1993 National Heritage List
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Dangerous Road Transport Reform Dangerous Substances Act 1979 Code of Practice for stormwater pollution prevention Goods (Dangerous Goods) Act 1995
Dangerous Substances Regulations 2002
Dangerous Goods Transport Regulations 2008
(1997)
IATA Dangerous Goods Regulations
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
Safe Work Australia Code of Practice - Labelling of Workplace Hazardous Chemicals 2011
Safe Work Australia Code of Practice - Managing Risks of Hazardous Chemicals in the Workplace 2012
Flora amp Fauna Environment Protection and Biodiversity Conservation (EPBC) Act 1999
Threatened Species Conservation Act 1995
Development Regulations 2008
Environment Protection Act 1993
National Parks and Wildlife Act 1972
Native Vegetation Act 1991
Native Vegetation Regulations 2003
City of Marion Regulated amp significant Trees guidance
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Groundwater National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Site Contamination shyNotification of site contamination that affects or threatens underground water pursuant to section 83A of the Environment Protection Act 1993 (EPA 83708) 2008
SA EPA Guidelines for the assessment and remediation of groundwater contamination 2009
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Odour Environment Protection Act 1993 SA EPA Odour assessment using odour source modelling Guideline (EPA 37307) 2007
Noise amp Vibration Environment Protection Act 1993
Environment Protection (Noise) Policy 2007
Guidelines for the use of the Environment Protection (Noise) Policy 2007
Australian Standard AS 1055-1997 Acoustics shyDescription and measurement of environmental noise
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
Safe Work Australia Code of Practice - Managing Noise and Preventing Hearing Loss at Work 2011
Public Health amp
Safety Public Health Act 2011
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Soil (erosion) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
Code of Practice for stormwater pollution prevention (1997)
Soil (imported) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
Soil (insitu) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Standard for the production and use of Waste Derived Fill 2013
Traffic Road Traffic Act 1961
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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AEC Environmental AGREENCAP CONSULTING COMlAr
26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
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AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
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bullbullbull bullbullbullbullbullbull
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Monitoring Well Location I __ t
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ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
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----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Dangerous Road Transport Reform Dangerous Substances Act 1979 Code of Practice for stormwater pollution prevention Goods (Dangerous Goods) Act 1995
Dangerous Substances Regulations 2002
Dangerous Goods Transport Regulations 2008
(1997)
IATA Dangerous Goods Regulations
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
Safe Work Australia Code of Practice - Labelling of Workplace Hazardous Chemicals 2011
Safe Work Australia Code of Practice - Managing Risks of Hazardous Chemicals in the Workplace 2012
Flora amp Fauna Environment Protection and Biodiversity Conservation (EPBC) Act 1999
Threatened Species Conservation Act 1995
Development Regulations 2008
Environment Protection Act 1993
National Parks and Wildlife Act 1972
Native Vegetation Act 1991
Native Vegetation Regulations 2003
City of Marion Regulated amp significant Trees guidance
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Groundwater National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Site Contamination shyNotification of site contamination that affects or threatens underground water pursuant to section 83A of the Environment Protection Act 1993 (EPA 83708) 2008
SA EPA Guidelines for the assessment and remediation of groundwater contamination 2009
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Odour Environment Protection Act 1993 SA EPA Odour assessment using odour source modelling Guideline (EPA 37307) 2007
Noise amp Vibration Environment Protection Act 1993
Environment Protection (Noise) Policy 2007
Guidelines for the use of the Environment Protection (Noise) Policy 2007
Australian Standard AS 1055-1997 Acoustics shyDescription and measurement of environmental noise
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
Safe Work Australia Code of Practice - Managing Noise and Preventing Hearing Loss at Work 2011
Public Health amp
Safety Public Health Act 2011
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Soil (erosion) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
Code of Practice for stormwater pollution prevention (1997)
Soil (imported) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
Soil (insitu) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Standard for the production and use of Waste Derived Fill 2013
Traffic Road Traffic Act 1961
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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AEC Environmental AGREENCAP CONSULTING COMlAr
26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
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AEC Environmental A Er A1 ltvlISULTING COMPA
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middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
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w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
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A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
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lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Groundwater National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Site Contamination shyNotification of site contamination that affects or threatens underground water pursuant to section 83A of the Environment Protection Act 1993 (EPA 83708) 2008
SA EPA Guidelines for the assessment and remediation of groundwater contamination 2009
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Odour Environment Protection Act 1993 SA EPA Odour assessment using odour source modelling Guideline (EPA 37307) 2007
Noise amp Vibration Environment Protection Act 1993
Environment Protection (Noise) Policy 2007
Guidelines for the use of the Environment Protection (Noise) Policy 2007
Australian Standard AS 1055-1997 Acoustics shyDescription and measurement of environmental noise
SA EPA Guidelines for Environmental Management of
On-site Remediation 2006
Safe Work Australia Code of Practice - Managing Noise and Preventing Hearing Loss at Work 2011
Public Health amp
Safety Public Health Act 2011
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Soil (erosion) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
Code of Practice for stormwater pollution prevention (1997)
Soil (imported) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
Soil (insitu) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Standard for the production and use of Waste Derived Fill 2013
Traffic Road Traffic Act 1961
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
20
AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
22
AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
24
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
27
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
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bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
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AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Soil (erosion) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013
Environment Protection Act 1993
Environment Protection Regulations 2009
Code of Practice for stormwater pollution prevention (1997)
Soil (imported) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
Soil (insitu) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) 1999 (as amended May 2013)
Environment Protection Act 1993
Environment Protection Regulations 2009
ANZECC Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites 1992
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Guidelines for the assessment and remediation of site contamination 2014
SA EPA Standard for the production and use of Waste Derived Fill 2013
Traffic Road Traffic Act 1961
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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AEC Environmental AGREENCAP CONSULTING COMlAr
26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
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Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
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ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation and Regulations
State Legislation and Regulations GuidelinesStandardsInformation
Waste National Environment Environment Protection Act 1993 Code of Practice for stormwater pollution prevention Protection (Movement of Controlled Waste Between States and Territories) Measure (NEPM) 1998
Environment Protection Regulations 2009
Environment Protection (Waste to Resources Policy) 2010
(1997)
SA EPA Guideline Waste containing asbestos shyremoval transport and disposal 2014
Waste Avoidance and Resource Recovery Act 2001
SA EPA Guidelines - Waste transport certificate 201 O
SA EPA Guidelines for stockpile management Waste and waste derived products for recycling and reuse 2010
SA EPA Handbook for Pollution Avoidance on Commercial and Residential Building Sites 2004
SA EPA Liquid storage Guidelines - Bunding and spill management 2007
SA EPA Standard for the production and use of Waste Derived Fill 2013
Water (surface Environment Protection Act 1993 Australian and New Zealand Guidelines for Fresh and water amp stormwater)
Environment Protection (Water Quality) Policy 2003
Water Industry Act 2012
Marine Water Quality 2000
Code of Practice for wastewater overflow management (2008)
Code of Practice for stormwater pollution prevention (1997)
SA EPA Guidelines for Environmental Management of On-site Remediation 2006
Weeds and Feral Animals
Environment Protection Act 1993
National Parks and Wildlife Act 1972
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
9
AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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AEC Environmental AGREENCAP CONSULTING COMlAr
26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
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AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
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bullbullbull bullbullbullbullbullbull
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Monitoring Well Location I __ t
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ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
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----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
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26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
27
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental A Er A1 ltvlISULTING COMPA
Aspect Commonwealth Legislation State Legislation and Regulations and Regulations
Work Health and Work Health and Safety Act Work Health and Safety Act 2012 Safety (WHS) 2011
Work Health and Safety Regulations 2012 Work Health and Safety Regulations 2011
GuidelinesStandardsInformation
Safe Work Australia Code of Practice - Hazardous Manual Tasks 2011
Safe Work Australia Code of Practice - Health and Safety Risks 2011
Safe Work Australia Code of Practice - Managing the Work Environment and Facilities 2011
Safe Work Australia Code of Practice -Work Health and Safety Consultation Co-operation and Co-ordination 2011
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
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AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
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bullbullbull bullbullbullbullbullbull
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Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental A NCAP 1UNgt LTINGCOMPAN~
20 SITE IDENTIFICATION
21 Location
The site lies approximately six kilometres south to south-west of the Adelaide CBD on South
Road Edwardstown (see Figure 1 ) The nearest watercourse or surface water body is the Sturt River which lies approximately three kilometres to the west
FORMER HILLS INDUSTIRES SITE
OWARO-
s
s
Figure 1 - Site location (source UBD)
22 Legal Description
The Allotment layout is presented in Figure 2 Audit Area 1 legal description details are presented in Table 2
Table 2 - Certificate of Title Details - Audit Area 1
Certificate of Title (Volume I Folio)
Lot Number(s) Street
Number Street Name Plan
5409 849 288 944 - 956 South Rd Filed Plan 10796
5411384 1 958 South Rd Deposited Plan 27678
5649 591 4 5-7 Ackland St Deposited Plan 4 772
5656 612 5amp6 5-7 Ackland St Deposited Plan 4 772
5804 381 290 958 South Rd Filed Plan 10796
5804 382 291 1 Ackland St Filed Plan 10796
5494 212 292 944 - 956 South Rd Filed Plan 10796
All titles are legally described for the area named Edwardstown Hundred of Adelaide The site lies in an area currently zoned Industry I Commerce within the City of Marion
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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AEC Environmental AGREENCAP CONSULTING COMlAr
26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
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AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
22
AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
24
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
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AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
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PCE MWH Nov 13 Apr14
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lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental AGREENCAP CONSULTING COMlAr
Copies of the current Certificates of Title for the Audit Area 1 site and council zoning records
are presented in Appendix A of the Environmental Site Assessment I Screening Risk Assessment report
3001
CL
7
155
1511
49
Figure 2 - Site location (source wwwpropertyassistsagovauplbindexhtml)
23 Site Description ampCurrent Land Use
The site is currently vacant unpaved fenced land with scattered vegetation
24 Surrounding Land Use
The site is situated in an industrial I commercial area and is surrounded by shy
bull Light commercial I industrial properties including Woolcock Commercial and Industrial Builders and the SA Government Department of Correctional Services to the north
bull Light commercial I industrial properties including homewares sales shed I garage sales and automotive parts re-seller to the east over South Road
bull Windscreens and tinting business (likely to have been a former service station) to the south east over the South Road I Ackland Street intersection
bull Cleared land (former Hills Industries site - Audit Area 2) to the south over Ackland Street and
bull Portion of the former Hills Industries site (Audit Area 3 - MUA1) and rail line to the
west beyond which lies Railway Terrace and residential properties
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
22
AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
24
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
27
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
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bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
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AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental AGREENCAP CONSULTING COMlAr
25 Proposed Land Use
As part of the former Hills Industries site redevelopment proposed concept plans show the extension of the existing Castle Plaza Shopping Centre located to the south of the site over Raglan Avenue The shopping centre is to extend over Raglan Avenue (to be reclaimed) over the footprint of Audit Area 2 and will extend to the north over Ackland Street (to be realigned through Audit Area 1) into Allotments 4 - 6 and 291 - 292 within Audit Area 1 The proposed
extension includes the incorporation of a ventilated basement car park
The site is proposed to be re-zoned for mixed use ie light commercial I industrial with the option for the incorporation of medium-high density residential use A proposed roadway is to run along the northern and western boundaries of the site An excerpt from the concept plan is presented in Figure 3
-J--l--11J__- PROPOOED BASBEN1 CARPARK
l ~ROADS (EXClUOED FROM -lHIS APPLICATION)
D Denotes Audit Are~1 Boundary
Figure 3 - Concept Plan excerpt (source CFSGAMNovion)
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26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
20
AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
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bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
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AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental AGREENCAP CONSULTING COMlAr
26 Geology ampHydrogeology
261 Regional Geology amp Hydrogeology
The 1 250000 scale Adelaide geolog ical map produced by the South Australian Department of Mines and Energy shows the surface geology in the area is the Pooraka formation
The Pooraka formation reportedly comprises alluvial I colluvial clays with varying amounts of sand and silt The Soil Association map of the Adelaide region indicates the near surface soils in the area of the site generally comprise red brown clay or sandy clay soils with low lime overlying sand
Reference to the former Department of Mines and Energy Report Book 949 Soils stratigraphy
and eng ineering geology of the Adelaide Plains indicates the site is situated in the Adelaide Plains in a landform area known as the Lower Alluvial Plain (see Figure 4) although as it is shown the site location is close to the boundary adjoining the Upper Alluvial Plain It is also noted that the site is located to the east of the Para Fault Zone
The general geological sequence at the site area comprisesshy
o Quaternary Age sediments of fluvial and marine origin of the order of 50 metres thickness The dominant formation is Hindmarsh Clay which is predominantly clay but has lenses of gravels silts and sands The Hindmarsh Clay is covered by clayey
material of the Keswick Clay and Pooraka formations
o Tertiary sediments of mainly marine origin up to 200 metres thickness are represented by limestones sands and calcareous sandstones of the Port Willunga Chinaman Gully Blanche Point and other formations
o Precambrian Age basement rock below approximately 200-250 metres depth
CUlldzooe- _____D Lowet aluwaJ pan ___D lJW-1 8111WlI~___D Goldea GlaquogtVegt shy D ~~baI- ---shy
lsobed pods o1 D Oualemt~ ~l __
Nfelfi(leaobedocl_ __D KllOlilEiRE9
Figure 4 - Geomorphic and geologic zones of the Adelaide region (source DME Report Book 949)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
20
AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
22
AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
24
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
27
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
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bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
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AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental AGREENCAP CONSULTING COMlAr
Cross sections presented in Report Book 949 indicate that the site is likely be underlain by
the followingshy
o Pooraka Formation - approximately 3 to 5 metres thick
o The Pooraka Formation typically consists of sandy clay and clayey to sandy silt with interbeds and layers of clay sand and occasional gravel Layers rich in carbonate silt and segregations occur within the Pooraka Formation
o Transitional Gley Clay and I or Keswick Clay and I or Quaternary Alluvium shyapproximately 5 metres thick
o Keswick Clay consists primarily of clay but may also contain bands of silty or gritty clay (quartz sand inclusions) and includes transitional Gley Clay- gley is a colour name applied to clay layers that have been subject to poor or impeded drainage conditions and have greyish to greenish colours and mottle patterns
o Quaternary Alluvium - is found throughout the Hindmarsh Clay Pooraka Formation and the Keswick Clay The deposits follow present and past drainage lines that emerge from the Eden-Burnside and Para Fault
Escarpments The material is predominantly sandy in texture may also contains abundant silt clay gravel and pebbles and
o Hindmarsh Clay - greater than 10 metres thick
o Hindmarsh Clay is predominantly clay with some sand and silt content
This is consistent with findings during site investigations The dominant natural soil type identified was red brown silty clay to a depth of approximately 08 - 10 metres underlain by pale brown to cream clay with calcareous inclusions See Section 262 for further detail
The Quaternary sediments within the Adelaide Plains include inter-bedded sand and gravel layers within which the water table (uppermost) aquifer generally occurs and also form other
deeper aquifers in the underlying Hindmarsh Clay formation (reportedly up to six distinct Quaternary aquifers have been identified - designated Q1-Q6 in literature (Gerges 2006) These aquifers are not highly utilised as the yield and water quality are highly variable The deeper Tertiary aquifers generally have better quality water and yields and are utilised in some areas within the Adelaide Plains
262 Site Geology amp Hydrogeology
Prior to the extensive soil remediation works conducted on the site between 2009 and 2013 the site was covered by a layer of fill material with thickness ranging between 05 and 1 m The fill material varied from sands to clays with secondary inclusions of crushed rock ash cinder red brick timber and glass in some locations Fill material extends up to Sm below ground level in the areas of deep excavation (ie Area B I Pit 9 and Area A I Pit 20 (see AA 1
ESASRA report for detail)
Natural material which underlays the fill is represented from the top by red brown silty clays and clays to approximately 4 - 6m (interpreted as Pooraka Formation) below which the clay
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
20
AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
24
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
27
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
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bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
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AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental ~ P CONgtulT NG COMPAN
becomes pale brown to grey with calcareous inclusions decreasing with depth (interpreted as
Keswick Clay Formation)
The Keswick Clay Formation is then underlain by grey clays with orange brown mottling (interpreted as Hindmarsh Clay formation) which was observed below depths of 9 - 10 m
The uppermost groundwater was encountered within the Pooraka formation (Q1 aquifer) The
top of the aquifer was intercepted at approximately 5m below ground level across the site The measured depth to groundwater level in Q1 ranges between 40 and 55 m The corresponding surveyed groundwater levels ranged between 21 5 and 236 m AHO (Australian Height Datum) which corresponds with the expected regional groundwater level elevation range The base of the aquifer is likely to be limited by the top of the Keswick Clay formation known to have poor or impeded drainage properties
The second uppermost aquifer (interpreted as Q2) was encountered in the Hindmarsh Clay formation at a depth of approximately 14 - 15m below ground level The 01 aquifer is likely to be separated from the Q2 aquifer by the upper extent of the Hindmarsh Clay formation which is represented by heavy clays
Groundwater level gauging events have demonstrate that groundwater flow underlying the site is in a westerly direction
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
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AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
22
AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
23
AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental AGREENCAP CONSULTING COMlAr
30 BACKGROUND
31 List of Previous Reports
The site has been historically assessed in a number of stages A list of previous investigation reports is provided below This report should be read in conjunction with the followingshy
o Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown Prepared by Parsons Brinckerhoff (Report reference 2121207 A-001 RKkmg) November 2006
o Limited Environmental Site Investigation Hills Industries Factory 944-958 South Rd Edwardstown South Australia Prepared by Environmental amp Earth Sciences NSW (Report reference 107053) June 2007
o Addendum to Environmental Earth Sciences NSW Report Number 107053 - Quality Assurance and Quality Control Document Prepared by Environmental Earth Sciences NSW (Report Reference 111109) December 2011
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A10L 101-B) January 2010
o VI amp Risk Assessment Advice - Vapour Issues Edwardstown Prepared by Environmental Risk Sciences (Report reference A1 OL201-C) December 2010
o Remediation Management Plan PCE Impact Soils - Source Removal Works Report
- Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698RMP01 ) March 2011
o Remediation of PCE Impact Soils - Source Removal Works Report -Allotment 288 Hills Industries Site South Road Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698R02) February 2012
o On-Site Vapour Risk Assessment - 944-958 South Road Edwardstown Prepared by Environmental Risk Sciences (Report reference AEC12EVR001-E) August 2015
o Environmental Site Assessment amp Screening Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698AA101) September 2015 Referred to herein as the AA1 ESASRA
o Detailed Risk Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698DRA01 ) September 2015 Referred to herein as the AA 1 ORA
o Remediation Options Assessment - Audit Area 1 Portion of Former Hills Industries Site Corner of South Road amp Ackland Street Edwardstown South Australia Prepared by AEC Environmental (Report Reference 3698ROA01 ) September
2015 Referred to herein as the AA 1 ROA
An overview of these reports is presented in the following sections
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
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AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
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bullbullbull bullbullbullbullbullbull
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if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
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Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
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t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
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bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
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1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
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Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
32 Background Information
The former Hills Industries site (which includes Audit Area 1) has been investigated on numerous occasions (including on-going investigation and additional reporting on various remediation and validation works) as follows
321 Site History
Parsons Brinckerhoff (PB) conducted a Site History report for the entire former Hills Industries site - Phase 1 Environmental Site Assessment - Hills Industries Site Edwardstown (Document Ref 06-0699-00-2121207A 9 November 2006) in 2006
The historical information reviewed indicates the northern half of the former Hills Industries site (ie that located to the north of Ackland Street) has a long history of industrial use The Pengelley family (furniture and carriage makers) and the Spurl I Sporrel families (possibly blacksmiths) occupied the north portion (ie Allotment 288) of the site from as early as the 1840s It is possible that furniture and carriage manufacture continued on this portion of the site (Hill family) during which time part of the site was leased to the Municipal Tramways
Company Hills Industries occupied this portion of the site from the 1950s until the site demolition commenced in 2009
The Ackland Street fronting portion of the Audit Area 1 site was likely to have been part of the fodder business (Ackland Chaff Mill) prior to the establishment of Ackland Street
Based on the site history review the following potential on-site contamination sources I issues were identified includingshy
o Former use of underground tanks (up to six) for the storage and dispensing of fuels
o Former use of aboveground tanks (AST) for the storage and dispensing of fuels
o Historical activities in this portion of the site included storage and use of lubricants use of a solvent bath and a plating shop storage and use of acids and caustic solutions storage and use of fuels and general widespread chemical storage
o Historical on-site disposal of waste acids onto the ground and a lined pit
o Use of in-ground sumps I drains to collect waste chemicalsshy
o Historical use of a weighbridgeshy
o Historical vehicle maintenance which included vehicle service pitts hoists and washdown areas
o Use of polychlorinated biphenyls (PCBs) in transformer oils shy
o Use of bitumen I asphalt for hard cover
o Historical use of termiticides and weedicides
o Presence of asbestos-containing materials in building products
o Fuel related contamination resulting from the use of portions of the site for car parking
o Use of fill material to level the site particularly the former low-lying land to the west
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
27
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental AGREENCAP CONSULTING COMlAr
The potential sources of site contamination associated with these past site uses include (but
may be restricted to)shy
o Use and disposal of solvents
o Use and disposal of acids and alkalis during anodising works
o Heavy metals and fuels during light engineering works
o Former use of aboveground and underground tanks for the storage and dispensing of fuels
o Foundry operations
o Historical vehicle maintenance
o Use of in-ground sumpsdrains to collect waste chemicals
o Use of fill material to level the site
o Use of polychlorinated biphenyls (PCBs) in transformer oils
o Use of bitumen to seal the site
o Historical use of termiticides and weedicides andor
o General uses of fertilisers pesticides and herbicides across the site
322 Soil Investigations
Intrusive investigations were first undertaken in mid-2007 by Environmental amp Earth Sciences (EES) comprising of the drilling I excavation of seventy two (72) soil bores I test pits across
the site
AEC soil investigations commenced in 2008 and are summarised as followsshy
bull 31 October - 14 November 2008 - AEC drilled 14 soil bores (BH 101 - 113 and BH126)
bull 28 September - 12 November 2009 - AEC excavated 41 test pits (TP101 - 141) as part of solvent impact investigation works (EES Areas of Concern A and B)
bull 17 - 26 March 2010 - AEC supervised the excavation of 28 test pits (TP201 - 228) within the footprint of the former Satellite Dishes I Playtime I Clotheslines Building
bull 5 July - 14 August 2012 -AEC drilled 5 soil bores (BH401 - 405) along the solvent impact plume centreline to assess the condition of the aquifer material
bull 2013 -AEC excavated 57 test pits (TP401 - 457) and 8 trenches (TR 1 - TR8) as part of further investigation works presented in the endorsed sampling and analysis plan for Audit Area 1
bull 2008 - 2013 - AEC has undertaken various delineation remediation and validation works The majority of these works were conducted in conjunction with site demolition activities
bull 2014 - AEC drilled two soil bores (BH501 and BH502) on the northern (west) boundary of the site
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
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AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Fill depth was reported to range across the site and was typically deeper toward the western
boundary Fill material across the eastern half of the site typically ranged from 02 to 05 metres in thickness and extended to 05 - 10 metres in thickness to the west (averaging approximately 07 metres) Fill materials varied comprising loose sands (with gravel and blue metal inclusions) in the upper layers and clays and silty clays in deeper fill layers Clay fill secondary inclusions were variable including brick fragments combustion wastes (including coke ash charcoal andor cinders timber bone and metal fragments
Deeper pockets of fill material (ie gt1 m) were identified in various areasshy
o car park located in the north east corner of the site (backfilled basement)
o former Woodroffe Facility in the south eastern corner of the site
o beneath the former Playtime I Clothesline Building (also associated with former underground tunnels)
o west of the TV I Antennas Buildings (backfilled UST pit)
o approximate location of a former transformer and sump adjacent the former Auto Press and
o backfill sands in the location of the former USTs (part of the former fuel dispensing facility) located to the west of the TV Antennas Building
Hydrocarbon and I or solvent odours and staining were identified in three locationsshy
o solvent odours in near surface and deep soils in the footprint of the Ironing Tables
Building
o solvent andor light fraction hydrocarbon odours in near surface and deep soils in the north west corner of the site near the Auto Press and Press Shop and
o hydrocarbon staining and odour in the base of a backfilled UST pit located to the west of the TVAntennas workshop
Zones of fill material with varying degrees of combustion waste impact were identified in six general areas across the siteshy
o Satellite DishesPlaytime Building (surface and near surface fill material)
o Clothesline Building (deep subsurface fill material)
o North west corner of the site likely associated with fill material used in the development of the former SAR rail siding (surface and near surface fill material)
o North east Car Park (surface and near surface fill material)
o Front OfficeTrampolines Building (surface and near surface fill material)
o Maintenance Building (backfilled brick-lined well) and
o Woodroffe Facility (surface and near surface fill material)
323 Groundwater Investigations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
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Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
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Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
Onsite groundwater investigations comprised the installation and sampling of 28 groundwater
monitoring wells and the sampling of two existing groundwater monitoring wells The locations of the wells are shown on Figure 5
Groundwater underlying the site is at a depth of 40 - 55 metres below the surface and reported a TDS range of 480 to 2400mgL (20132014)
Significant chlorinated hydrocarbon impact (primarily PCIE) has been identified underlying the northern portion of the site extending off-site to the west
Heavier fraction hydrocarbon impacts have been identified in two locations along the northern portion of the site (light fraction impacts being likely attributable to the identified solvent impacts) and heavy fraction impacts in the northern portion and beneath the former Clothesline
Building footprint
Isolated cyanide hexavalent chromium manganese nickel and zinc benzene and xylene impacts have also been identified across the site as a result of past activities carried out on the site
Boron and nitrate concentrations exceeding adopted screening criteria (ecosystem protection drinking water and irrigation) were reported in groundwater underlying much of the site The concentrations reported in groundwater underlying the site are considered to be indicative of naturally occurring background levels (in the case of boron) and a combination of ambient I historical impact-related concentrations (in the case of nitrnte) across the local region given its past history of agricultural use
Groundwater impacts are further discussed in the AA 1 DRA report for the former Hills Industries site presented under separate cover
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
21
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental A Er A1 ltvlISULTING COMPA
wObhOP ctiemical fNorthSUll9 ~~--------
middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot--middotll car Pant - middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddot)i(MWF Tube Miil ~~bullbullbulll i - middot
Wheel BarfOWll bull bull---middot-middotmiddotmiddotmiddotmiddotmiddot-middotmiddot MlllE middoti ----~~-----1 -middotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotr-J Denollls Former Hils IndustriesD Sile Boundary (northem portion)
bullbullbull bullbullbullbullbullbull
Prebull Shop middot1~middot~middotmiddot1middotmiddotmiddotmiddot-~a r-middot--~~-middot-middotmiddotmiddot TabieS MllD r~ ~ Front
j l~i 1111 roninll bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull PrlntilQ bullbullbullbullbull i l OftiOamp
if T8118fcCTT bullbull bullr11---middot~-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotMWAL )i l Malnt -g DenolN Audit Area 1 middotmiddotmiddot r-middotmiddot-middot I I 1- Sille Boundary I i ~ PlaStiel i 1 MWID Z Main l8Uf1ldrY bull bullbull I J ~ i Stlll9 ~ Arnlfl9llil191 l ~--middotmiddotmiddotmiddotmiddot-middotmiddot--middotmiddotmiddotmiddotmiddotmiddotmiddotmiddot
I I t middot -middot -middot-middotmiddotmiddotmiddot---middot -middotmiddot -middot middot middot middot middotmiddot- -middot ~I bull J middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddot-middotmiddot bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull-- ~-~middotmiddotmiddotmiddotmiddot I - _ - - middot --middot--------middotmiddot--middot t I t bull bull
Denotes Groundwaler I ~-bullbullbullbull bullbullbullmiddotbullbullbull - middot -middotbullmiddotbullmiddot middotbullbullbullbullbullbull I f o
Monitoring Well Location I __ t
rmiddotmiddotmiddotmiddot r-t rmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot IWiQ - i 15 l t t ~ t ~
ar ~ bull t t Qothel81 1 el t rmiddotmiddotwi o-t~Dlte -~ playfimB ~ - t ~ 1I c i 1 L ~ ~ bull lDendeg88 Grau ndwller
w llWt Antw4inu i bullmiddotmiddot-11 i OlsMS ~bullbullbulll 1MonilDIWlg Well Location wt= l l t 1 l ubullbullbullbull ubullbullbullbullobullbullbullbullbull-bullbullbull bull bullbullbullbullbullbull-bullbullbullbull fr9nlfomlll--d(decommibullioned and replaced) I I l I bull __tJle Uqulds ~ middot - --middotmiddot shyi __J ampI ~ IJU9bull bullbull- -bullmiddotmiddot-rbullmiddotmiddot-middot-middotmiddot-middotbull car trmiddotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot bull P 11111CQ2- 1t11e I --~Amiddots~n l w-- l Pant
w middotmiddotmiddotmiddotmiddotmiddotmiddot1middotmiddotmiddotmiddotmiddotl ~~-~ middot - I guuo _ t bullbullbullbullbullbullbullbullbullbullDenolea Fonner Groundwalllr
Cbull rmiddotmiddot1Park bull bull
i J
1
A _ ----------1middotmiddotmiddotmiddot-middotmiddotmiddot-middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot 1 l --~ I 1 F_- __ 1 bull bull - middot 1 -i1n7
MonilDring Well Location
bull t I )(n - iJIYV 1 WAZ ~ rmiddotmiddotmiddot watar tmiddot---middot- ~ )(
QQ Treetmenl Jl~----middot-middotmiddotmiddot-middotmiddot-j L---middot-middotmiddot-middotmiddotmiddot-- middotmiddot--middot i u pp i
n bull --middotmiddot--middot-middotmiddotmiddotmiddotmiddotrmiddotmiddot1 HoUt19i 1 ~ i REsAD i l l deg __1-----middot---middoti L omiddot-----1 shy i ~ -middotl
-Yl cwPartt
Om 100m
----==---===-shy
Figure 5 - Audit Area 1 Groundwater Monitoring Well Locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Refmiddot 3698)
22
AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
24
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
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AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
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AEC Environmental AGREENCAP CONSULTING COMlAr
324 Soil Vapour Investigations
Soil vapour risk assessments were undertaken relating to the solvent impacts (chlorinated hydrocarbons) identified in soil and groundwater
Margins of Safety (MOS) were developed to assess potential vapour intrusion risk based on soil gas data collected on-site The potential site-use scenarios considered include the following
bull Scenario 1 - Commercial I industrial - with buildings constructed as slab-on-grade and exposures may occur by long-term workers within these buildings
bull Scenario 2 - Commercial I industrial with underground car park - this includes a multishystorey development with 1 level of basement car park (extending to 3m depth) where exposures by long-term workers may occur in the basement as well as in work areas located on the ground or upper floors
bull Scenario 3 - Mixed use (including medium I high density residential) - with buildings constructed as multistorey buildings on a slab with commercialretail premises on the ground floor and residential on the upper floors Exposures by both long-term workers and residents may occur in these buildings
bull Scenario 4 - Mixed use (including mediumhigh density residential with potential basement use) - this includes a multi-storey development with 1 level of basement car park (extending to 3m depth) with mixed commercial and residential areas above
Exposures by long-term workers and residents may occur in the basement as well as
in work areas located on the ground or upper floors
bull Scenario 5 - Standard residential - this is assumed to comprise low to medium density residential homes constructed on a slab where exposures by residents may occur within the home
bull Scenario 6 - Standard residential with basement - this includes a medium to high density residential building with 1 level of basement car park (extending to 3m depth) Exposures by residents may occur in the basement as well as on the ground or upper floors and
bull Scenario 7 - Public open space -where exposures may occur by residents or workers in outdooropen spaces only
Risks to future commercial I industrial workers residents in a medium to high density setting (ie scenarios 3 4 and 6) and public open space users (ie Scenario 7) were considered
acceptable Low density residential use (ie Scenario 5) is considered unacceptable above areas where groundwater is impacted with chlorinated solvents (ie along the plume centre line along the northern site boundary)
The results suggest there are no major risks to future site occupants for the proposed site use being mixed use No significant risk has been identified for workers in excavations (ie service
trenches up to 1Sm bgl during construction and maintenance or appropriately constructed basement excavations up to 3m) above the impacted groundwater
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
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I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
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Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
40 SOIL REMEDIATION WORKS
41 Completed Remediation Works
Specific areas identified for additional remediationclean-up and validation works were recommended in desktop (PB) and intrusive investigations (EES and AEC) conducted between 2007 and 2014
411 Remediation Rationale amp Methodology
Validation works (excluding Area B which was a large area near the northern boundary of the site (north eastern corner of the former Ironing Tables Building) that was inferred to be the source of solvent contamination in groundwater - see Section 412) were performed opportunistically as the site was demolished Material excavated from around subsurface structures andor impacted areas was stockpiled on hardstand whilst samples were analysed for classification of the material Later in the demolition once available hardstand was
removed impacted stockpiles were stored on high density polyethylene (HOPE) All stockpiles with visual or olfactory impacts were covered with plastic until removal from site
Validated excavations were reinstated with either site-sourced material (if deemed suitable for re-use) andor imported clean material
Completed remediation works are detailed in the AA 1 ESASRA report and the locations of these works are presented in Figure 6
412 Remediation Rationale amp Methodology - Pit 9 I Area B
Significant solvent impact was identified in soils in the vicinity of a former solvent bath located
in the north east corner of the Ironing Tables building This area was identified as a high risk of ongoing impact to groundwater and was subsequently remediated during demolition works
Bulk solvent-impacted material excavation works were completed in this area (see Figure 6) The excavation was extended to approximately Sm below ground level and validated in accordance with an approved Remediation Management Plan (RMP)
The excavation was reinstated with a combination of site-sourced and imported material in accordance with the RMP The backfill materials (and placement of) are summarised as follows
Various materials were sourced for the backfill of the excavation A summary of the materials
used for backfill (endorsed by the Auditor) is presented belowshy
bull Ballast - homogenous quarry material sourced from the Sellicks Hill Quarry used for backfill at the base of the excavation (approximately 225-229m AHO)
bull Site-sourced Material - approximately 2800m3 of materials generated on-site from various sources (primarily excavation overburden) was tested and classified as intermediate landfill cover (ILC) and deemed suitable for backfill at an intermediate depth
This material was used to reinstate the excavation between 2 - 4m bgl (approximately 249-269m AHO
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
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AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Imported Material - two materials were tested and approved for use at the site for backfill purposes This was used to backfill the excavation at the base (ie gt4m bgl) using a red brown siltysandy clay and grey boral sand (upper 2m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
25
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
27
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental A Er A1 ltvlISULTING COMPA
WoricshopChemlcalPIT6 Site StoreBoundary-_
PIT S tApprox ~ AreaCI~Orth
Remedlallon Valdalion-
Fonner Elltlldings
D Fmr Hi it lnctlllrtee Sile Boundary
Audit Area 1 llouidaryD ~
I 1shyl 0 en
Employee car Park
Car Park
ACKLAND STREET
I I
Figure 6 - Remediation and Val idation Works locations
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
26
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
27
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental ~ P CONgtulT NG COMPAN
42 Post-Remediation Site Condition
421 Post-Remediation Site Condition - Soil
Various Ell exceedences are scattered across the site (see Section 531 of AA1 ESNSRA)
and as presented in Figure 7
It is noted that the investigation and validation results were collected prior to the 2013 amendment of the NEPM (1999) As the assessment process has continued beyond the transition between the 1999 investigation levels and 2013 revised investigation levels the investigation and validation results were rescreened against the new (2013) criteria This has
resulted in minor number of results that now exceed the current criteria in the instance that the new criteria is more sensitive than its predecessor
This particularly relates to PAH results however it is noted that the most severely PAHshyimpacted fill material has been removed from the site (ie in Areas of Concern F and H) however some combustion-waste impacted materials remain onsite with impacts below the
acceptable investigation levels andor as a result of the investigation level amendment Management measures for this material are presented in Section 7
Based on the reported groundwater concentrations solvent impacts may remain in aquifer material under the solvent-impacted soil area (ie EES Area of Concern B see Section 6103 of AA 1 ESNSRA) however significantly elevated chlorinated hydrocarbons were not reported
in samples collected from within the aquifer material nor in the remediation excavation base
Combustion waste (typically ashy fill material) is scattered across the site The approximate distribution of this material is presented in Figure 8 It is noted that this material has been adequately assessed and is considered suitable to remain on the site for the proposed
development Remaining impacts including isolated pockets of ashy material on site for which HILHSL exceedences exist are summarised in Table 3 and presented in Figures 9 and 10
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
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AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental ~ AP COlltgtulT NG CCMP N
Table 3 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Soil
Material CoPC
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Ell Exceedences
Heavy metals
TPH amp PAH
Fill amp Natural
Material
Scattered across site (see AA1 ESNSRA
Section 531)
Vegetation Plant uptake Vegetation stress I
mortality
Inclusion of clean fill
material (gt1 m) in future
garden areas
HIU HSL Exceedences
Lead Fill
(02-03m)
BH06 - adjacent north west corner of
former WorkshopChemical Store (AA1
ESNSRA Section 6 22)
Construction
(civil) workers
Dermal and
inhalation
(negligible) Ingestion
(possible)
Increase in lead
concentration in blood
(gt1 OmicrogdL affects to
neurosystem
Implementation of HSE
Plan (inc use of
appropriate PPE)
Fill TP224 - footprint of former Playtime
(03-04m) Workshop (AA1 ESASRA Section 538) haematological and
cardiovascular
systems
Nickel Ashy Fill
(09-1 0m)
TP401 (1400mgkg) - north west corner
of site (AA1 ESNSRA Section 538)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible
Skin hypersensitivity Implementation of HSE
Plan (inc use of
appropriate PPE)Natural Clay
(04-05m)
Footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Lead amp Nickel Fill
(gt3m)
Backfilled brick-lined well (P18BW) in
footprint of former Maintenance
Workshop (AA1 ESNSRA Section 619)
Construction
(civil) workers
As above As above Implementation of HSE
Plan (inc use of
appropriate PPE)
TPH amp BTEX) Natural Clay
(gt3m)
North western corner of site in the vicinity
of former Pit 6
Construction
(civil workers
Dermal contact
ingestion and
inhalation (possible)
Carcinogenic
(benzene)
Implementation of HSE
Plan (inc use of
appropriate PPE)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
28
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental ~ AP COlltgtulT NG CCMP N
CoPC Material
(Depth)
Location concentration and further
information source
Potential
Receptors
Potential Exposure
Pathways
Risks from
Exposure
Mitigation Measures I
Actions
Carcinogenic
PAHs as
Benzo(a)pyrene
TEQ
Disturbed
Natural Clay
(06m)
Pit 2 (53mgkg) - footprint of former
Pyrolysis Ovens (AA1 ESASRA Section
63)
Construction
(civil) workers
Inhalation
(negligible) Dermal
and ingestion
(possible)
Carcinogenic via all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
Ashy Fill
(02-03m)
Pit 20 (39mgkg to 72mgkg) - footprint
of former TV Antennas Workshop (AA1
ESASRA Section 6 35)
Ashy Fill
(04-05m)
TP430 - adjacent north east corner of
former WorkshopChemical Store
Ashy Fill
(00-01 m)
TP426 (47mgkg) amp TP427 (63mgkg) shy
footprint of former Store
Construction (all)
workers Site
visitors
Implementation of HSE
Plan (inc use of
appropriate PPE) Ashy Fill
(00-05m)
Area F amp TP211 (48 to 82mgkg) shy
adjacent central portion of eastern site
boundary (AA1 ESASRA Section 6 23)
Ashy Fill
(00-05m)
Area H (HTP4-61 mgkg amp HTP7shy
93mgkg) - located in south east corner
of the site (AA1 ESASRA Section 624)
CHC-PCE Natural silty clay
(gt5m)
Sub Pit 9 I Area B (AA1 ESASRA
Section 610)
Construction
(civil) workers
Inhalation dermal
contact and ingestion
(possible)
Classified as likely to
be carcinogenic by all
routes of exposure
Implementation of HSE
Plan (inc use of
appropriate PPE)
NOTES BTEX - Benzene Toluene Ethylbenzene Xylene(s) CoPC - Contaminants of Potential Concern CHC - Chlorinated Hydrocarbons HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment TPH - Total Petroleum Hydrocarbons
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
29
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
__
Denotes soil bore I test pH location
-$- H Denotes HBBvy Metal Ell exceedance (various etflerla)
Denotes Benzo(a)pyrene ESL exceedance (4mgkg)
-$-H Denotes TPH ESL exceedance (various criteria)
middotmiddot
bull P~Ymiddot nt~
cf8 r~
BH49 ( -~ -
r-- L bullbull J
Fonner SileFeatans
-----~---------- r-~+ TP~ TP447 bull middot
D
D
FnYHllllndustr1ee Sile Botrdary
~128 Anternes ~
BH48 ===~~middot~middot---------j i shy - - shy
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
tApprox BH6 tQOll CTP3 29
Denotes trench locBUon TP w13J ---1 -- a-- - TPttt-- --wbull10- -~~~ TP _ _-tof__ f - 111 _ ___ _-Haz iiiiN rP430 C)f Park~ North~TP 14-- --H-3 ~Tl-- -~~- _ __- rs105- - __ _ e______ _ TR2 B TR7 CTP4 CTP1
TP437 rP433 106 BH106 lP431 TPbull I TPl4 I TPl4() BH106 fr -$- CTP2
middot amp-e-TP-32-- iiiiiar ------------------- ---------- middot-bull - 9eampr~~ re1e-p1M -0H03----------~-middot cTP5 CTPa BH1~~-9 _ -J H18 bull----------------- ------ -----TPlJ4fbullbullbull BHID BH9 ~--- _--~ OrTnerTP~ TP131 0BH103 sM i103 r-middot-middotmiddotmiddotmiddotmiddot-middotmiddotmiddotr----------ltrbullbullW7bullbullbullbullbullbull
TP~ TP129 BH104 TP112 B~ TP113 TP114 ~ 1 TP106 TP)OI Handles TP414 Press - g -Qo-_rPbull22 BH20 BH30bull o1W Ironing Tables TP1M BHs 0
BH15I ~ BHlampB ~ TP1315 BH4- bullbull TIl30 r_T_____fPo---Tf -----1--~~~------T~~ -----T-1 bullbullbullbull1~~ ----~1_bullbullbull) TP412 ~---~1~ Front ~
bull ~ TPG TPbull11 bull Printing M 1 t Office a TPl23 bull c 8H22 TP128 TP127 l-1 an bull TP~bullMain 9H21 -g 8 ~
TP124 TP125 TP128 P18Bi8 ~110 I 8H45 Store iij~lt Plastics sH23~ - sHS I 1- I shy
~ + J bull TP413 bull JI J bull er4sirh_ 0 ~BH302 TPlt403 -( TPlt01 TP408 TP410 Ammenities - i eq 8~ shy
------ ----___ __ __ --- --- _------------- - ----- -JP2g-------------___ _ ---- ---- -~_ __ 8H25 ----~$-a- ---_m_shy en ~ ~~-------~-~~~~~~ -ra1 ~c-tr~~--~~tpound~iY~- middot--eH28
~ llBH43 bullmiddot--bull ~ TP438 TP TP227 T~ TP222 TP218 BH111 TP211 TP212 l s sect$--~-9-I~~~1ti48bull -f5r bull bull TP208 TP215 p~ 8 ~ ~---~ ~ TP439 Satellite s~ TTgtlaquo5 ampH31 Playtime BH
112 ClotheslinesTP200 TPlaquoS imoz E r+_441 BH42 e i Dishes TP220 ~ -f5r
i~ s7~-- -~1- -~~~~~~ -~~1-middot~~r~a-tgtr05AmiddotE~~--~~-middot-~-ri~rm1~L Room~---- middot~ r-----T----ltuquids~------------- r-----11lt1raquo____
TIe - TP458 ~~~- -__ lf125 ~ea HTP7 dH Car P451m52 TPbull1e TP422 BHeO ~ BaHBbull ~ HTPs 156 farkBH51
TR2 TR3 -~water Treatment TP~~ bull Store TP i llH308 i ~ HTP2 ---- shy27
TPlt42S 4 KTP4 Bu 8Ht01 TP50TP420 TP423 Ji - 11
HPP ~~-------- --- ~10 HTP5 lfR12~ BH5i t~~~-------~~---1 ~ HTP3 HTP6
House bull Car ~ -- tPm aH102 BH52 RESAD ~---j Park Woodroffe TP421
L i TP424 i BHS8 FacilityL-------middot BH305
Car Park BH58 middot-----__ deg _F -SOdlon 82311gtlt _ pll (fTP)- shy
100mACKLAND STREET
Figure 7 - Soil EIUESL Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
30
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
L-- J
D
Fonner SileFNllJtee
Fmr Hills lndus111es Site Boundaty
iJ-bullrj bullQ
8H49 ~ TP ~126
TRI
BH48 ===e~~--~~-----------
Employee Car Park
AEC Environmental A Er A1 ltvlISULTING COMPA
Press Shop ApproxCTP3 TP29BH8
Denotes trench locatlon TP ---- -- -bull l -- ___ ___ -_ 111902 -~~~o- -w 10- - =~_~~~ml__ _ _ ___ iiiS 7nlrtt-rrbullio _ Park --- -- - --~- ___ ~=-~1- -- 1r~TPI09 -TP - __ ___ _ _ _ _ JH Northt W 34 TP133 Pi13 BH82 bull g eH1 rrp~ middot CTP9TR2 1 ti TR7 TP141 TP140 BH IOamp 8H1 $- CTP1 -$shy
TP437 ~ f8Hle --middot 433 ~~~~--~~ l~~ ----- li~L---TPJ3Q bull J11~1Mmiddotmiddot---middotmiddot-- - middotmiddotmiddot -- )l bull~5 CTP5 CTP2 -----aJ(111~--- ---Denotes soil bore I test pit location L bull BH1ampr~~- 8Hl8 bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull ltfl ~bullbullbullbulllP104f-middotmiddotBH403 OHIO - L $-bullbull amp -$-CTPS
Tr n rmer-TP31( TP133yjBH103 -iP103 rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddot--~----bullcvr -$-amp Denotes combustion waste (ash cinder a 0 TP4~ 1129 BH104 TP112 ~ TP113 TPl14 BHl7 TP10amp TP)01 Handles TP414 charcoal slag) Impact observed A Press- HQ-~- TP122 BH20 I roning Tables __ 11 0
BH1s7 it BHtD Z5406gt TP138 TPldeg eHltbullbullbull bull amp 5rmiddotmiddot TP130 rmiddotT]__L_wo4middotmiddotmiddot11 middotmiddotmiddotmiddot-j--~-~ T~~ ---middotmiddotT1~bullbullbullbullT_P_1~ bullbullbullbull~~1bullbull ) TP412 ~---~] 8E Front ~ ~middot bull _TP40lli TP409 wbull11 bull Printing a ct TP1~ bull Ct BH22 TPl2B TP127 M t bull Office
~ TP~bullMalfr BH21 1 8 I TP128 ain -8 ~ 110 r24 25 StoreB iij lt l TP~ TPt Plastics aH2~ bull BH3 _ tshy_ I l J TP413 I I I Jamp gt
BH302 i TP403 TP407 TP40amp w410 Ammenities middot eq BHz
(J) middot~~middotmiddot~imiddotmiddotmiddot~middotpoundi=~middot~~~~~middoti~~~~middotmiddotmiddotmiddot 0
TPWJ
TP214Pv ~~- l -$- Pl yt e2 TP208c TP215 +lti )H95 8 -m Amernas bullbullbullbullbull ~ Satellite aH34 TP445 eHS1 a 1me lotheshnesTP20 TP443 ~ E m13
BH42 e TP431l Dishes -$- TP220 ~ f I gt 8H38 TP417 TP226 TP223 BH13 Tii206 TP205 TP204 TR5 BH2ll I ~ TP201
Q bull _BBH35 TP444 BH30 BH29 ~ middot---- sewin1tmiddotmiddot-ilW------m-- ~middotmiddot~ middotmiddotmiddotmiddotmiddot1nfiammatiia middot-ErsAmiddots~ti~~ti~~---middotmiddotmiddotTriinsfomieC---middot
Room~---- liQe rmiddotmiddotmiddot-middot------Liquld~-----middot--middot-middotmiddot-middot rmiddot----IW bull18 ~ TP458 r~~-- iw-i Alt25 middot - TP452 HTP7 ~ Car
TP419bull m22 eHeO -- B sH81 e~B -5iiwe Park BH51
TR2 TR3 -~~Water Treatment -~ Store TP 2T i BH308 s HTP2 middot-~p middotmiddotmiddot- TP421 4 HTPT n_-f BH101~ TP~ I TP-420 TP423 1-~ I I EHlUDBI
HPP BHS7 eH59 LPG BHeall ls~ ~ ~ House TR12 ---middot------- ---~ Car -~----~---------middotmiddot BHll7 BH102 oH70 HTP5
BH52 TP421 RESAD ~ bullbullbullJ Park Woodroffe
_____________ TP424 8H58 Facility
8H305 ---------- _____ __ Car Park BH58
Oo-o lvoa F IOOI pit (FTP)middot -Secton823for11J111w-I
100mACKLAND STREET
Figure 8 - Approximate Distribution of Combustion Waste Impacts (typically within fill material in upper 05m)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
31
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
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I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental A Er A1 ltvlISULTING COMPA
+ApproxDenotes trench locallon
TR2 I~Orth Denotes soil bore test pit loartion
-_ll Denotes Remaining HILB exceedanoe ___- (excludes those considered statlstically
suitable ID ramain onsitll)
Denotes Remaining Area F HIL B exceedance (excludes those considered statisUcally suitable ID remain onllla)
bull 0
~ 0 cDenoteamp Potential autgt-Area B remediation I shysolvent impacts in aquifer malarial =gt0 en
--- rr1 ~1 lH43 u )D I LJo
D Fmr Hiia lnduotrloe Siio Boundary
D BH51
Employee Car Park
Car Park - _ pbull (FTP) -Sedlonl 231orbtlashy
ACKLAND STREET
Figure 9 - Remaining site impacts including HIL B Exceedences (former site layout overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
32
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
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I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
bullbull
AEC Environmental A Er A1 ltvlISULTING COMPA
+Approx Proposed Castle D Fmr Hills Industries D Audit Area 1 D Background shyP401
Plaza Extension Site Boundary Boundary ProposedI~Orth Footprint DevelopmentB Denotes location of Exceedance Impact
~ Denotes impact in ashy fdl
bull I disturbed natural material Ni - Nickel Pb-Lead PAH - Polycyclic Aromatic Hydrocarbons
HTP4 (PAH)
100m -Figure 10- Remaining H ILB Exceedences (proposed redevelopment overlay)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
33
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental ~ P CONgtulT NG COMPAN
422 Site Condition - Groundwater
The chemical concentrations which were reported in groundwater samples collected from the wells located within the Audit Area 1 above their respective adopted environmental guideline values were as followsshy
o nitrate
o total organic carbon (TOC)
o heavy metals (boron lead manganese nickel and zinc)
o total petroleum hydrocarbons (C6 - C9)
o total petroleum hydrocarbons (C10 - C36)
o benzene
o xylenes (total)
o volatile chlorinated hydrocarbons
o tetrachloroethene (PCE)
o trichloroethene (TCE)
o cis-12-dichloroethene (cis-12-DCE) and
o vinyl chloride
The presence of boron and zinc in the onsite groundwaters are likely be associated with the
background (ambient) groundwater which enters the site from the east Other chemicals reported in groundwater samples are likely to be associated with the potential contaminating activities and sources identified at the former Hills Industries site andor a combination of
ambient conditions (eg nitrate)
A review of the potential exposure pathways for groundwater to impact on human health within the Audit Area 1 site boundaries is summarised in Table 4
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
34
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental A Er A1 ltvlISULTING COMPA
Table 4 - Potential Exposure Pathways and Risks to Human Receptors from Impacted Groundwater
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
TCEDCEVC Workers It is noted that the vapour risk assessment discussed in Section 7 0 of the AA 1 ORA demonstrates that risk to the human health of construction workers (if groundwater is not exposed) is expected to be acceptably low
along the CHC plume (see Figure 11) the air quality should be monitored Deep excavations should be treated as potential confined spaces and appropriate health and safety protocol should be developed under the guidance of a HSEP
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
TPHBTEX Construction (civil) Workers
Inhalation Unlikely Concentrations do not exceed HSLs Avoid exposure via the implementation of HSE Plan during works including use of appropriate PPE
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
Nitrate Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is extremely unlikely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
I
I
I
I I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 35 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental A Er A1 ltvlISULTING COMPA
CoPC Potential Receptors
Potential Exposure Pathways
Risks from Exposure Mitigation Measures I Actions
Heavy Metals Construction (civil) Workers
Inhalation Unlikely Non-volatile NA
Dermal Unlikely The chemicals identified in groundwater do not have potential to cause skin problems or penetrate through the skin at the reported concentrations
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
Ingestion NIA It is highly extremely that maintenance workers would use raw groundwater (if exposed) for drinking during construction works
Avoid direct contact via the implementation of HSE Plan during works including use of appropriate PPE
NOTES BTEX- Benzene Toluene Ethylbenzene Xylene(s)
CoPC - Contaminants of Potential Concern
CHC - Chlorinated Hydrocarbons
HSE Plan - Health Safety and Environmental Plan
PPE - Personal Protective Equipment
TPH - Total Petroleum Hydrocarbons
I
I
I
Construction Environmental Management Plan Audit Area 1 (September 2015) 36 Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental AGREENCAP CONSULTING COMlAr
Table 4 shows that there is potential risk to human health of construction workers involved in
deep excavation if groundwater is exposed Appropriate health and safety protocol should be developed for works within the excavations However the risk to the human health will remain acceptably low if the excavations do not expose groundwaters impacted with volatile chemicals (refer Section 80)
The location of the groundwater solvent impacts are presented in Figure 11 a hydrogeological
cross-section of the solvent impacted area (along the northern boundary of the site) is presented in Figure 12
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
37
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental A Er A1 ltvlISULTING COMPA
llllNH_Q2 NOY 13 l(K 14 Aug 14 Oct 14 MWG Nov 13 Affl 14 Aug 14 Oct 14 MWBK J8n 14 Af114 Wg 14 Oct 14 MWF NOY 13 Affl 14 AuQ 14 OCI14 MW11L Feb 14 flt 14 Aug 14 Oct14 tNorth PCE 039 lt1 17 8 PCE ISO no 120 StO PCE 2100 2100 1200 1400 PCE 027 1 091 047 PCE 17 9 21 14 MK Nav13 Af114 Aug 14 OCl14 TCE 18 28 027 027 TCE 1SO 110 580 11 TCE 5 ff 55 TCE 011 lt1 029 02 TCE 211 211 7 S4 PCE 70 210 150 150 OCE 001 lt1 lt001 lt001 DCE 94 t7 II ff DCE 12 lt20 31 2lS DCE 002 lt1 091 lt001 OCE 440 SfO 1bull flO TCE M a 98 t7 VC lt005 lt005 lt005 lt005 VC 11 13 31 11 VC lt1 lt1 U lt5 VC lt005 lt005 lt01gt5 lt006 VC 17 lt5 13 lt6 DCE 51 8 14 32
_______IW_g_1_4_0Cl_1_4~ Z~~~~-p~ ~-- l~MWE 1~-~-~_lt_1~_lt1~_lt_ lt5Apr14 Aug14NOY13 Ocl14
PCE MWH Nov 13 Apr14
57 1 34 291IOO 170CI1---+--+----+-a--200--~1- -r ~ - t--PCE--I ~ ----------1-i---- 1 11 17
--_+_+-+52_-+-5i I P-S ShOP bull bull bull bull bull bull bull bull - - bull ~ middot-bull _- bull -middotw-bullbull - -bull-- -T bull bull__1 - bull ~ - - 1-0CE__--4-1---+c----+-~ TCE 42 2t 5e 41 middotmiddotmiddotmiddot ---imiddotmiddot~~~F-middot Tube~~~ bull -ta r-~-~~-~~ TCE 1l
lt1 09011 08DCE 15l---+---+---4--1----1 L bull bull bull bull bull bull bull bull - ~~9- bull bull bull I -i_ jHlln-i I t---+---t---+--1----1lt1 lt1 lt005 lt00511 lt1
JH lJWTij I I 0degf81M I I I fTOll L--vc--L__-1__--Lbull bull7___lt_5_ - -~ - I liltlll Niiigt I 1 I -~ r I _VC__---------_---~_j
I I bullW I I 1- - ~1 Q rMiNJlN1wittA~rotti-----~fl~111Riu~P1yen-JMWJ NOY1S l(K14 Aug14 Oct4 PCE 230 t20 no 1M TCE 53 8 71 8 1
OCE 12 2 17 11 vc lt01 lt01 lt1 lt5
I ~ - - - - - - ~ printing I a ~middotmiddot- - shy MWD Nov 13 Afgtr 14 Aug 14 Oct 14w I Iff bull lrmbullbull~~-----~Wo--tmiddot middot middotmiddot middot middotmiddotmiddotmiddot-middotAi_middot middotmiddot middot ti Mlllnl PCE 121u11111 tteeo t100 ~ lOIO 1
t ~ bull 1 I ~ I Nllf8 TCE 71 M 31 11 Maki 1l8Undrfl P1811b L I ic ------shyDCE 29 64 28 51
vc lt1 lt1 lt10 lt5 I~ I I ~ $tOT8 ~+middot ~~-- i____ ~----- f ~
lIJ I ~ bullbullbullbull1-------- ------- ------------ --~-rmiddot- shy-i
bull --- - - ---------- l tlNN Nov13 Apr 14 Aug 14 Oct14
bull -K rmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotbull ~ - I r-- shyo Grounclwabullr PCE 1700012IOO 10GOO 12000)( ~ltol1ng Wt oatlQI - 1 wmiddotmiddotmiddotmiddotmiddotmiddotrmiddotmiddotmiddotmiddotmiddot IWAH peyinll Cllhunee
I
I
TCE G 41 1 51 No Guideline Egtcceedance
DCE 28 lt10 113JQ ~ ~ - J l _L_ __llL lt1 lt1 lt005 lt5bull I tnttllM8 I f-1 I middotmiddotmiddot-middotmiddotmiddotbullmiddotmiddotmiddotmiddot-middotmiddotmiddotmiddot-bullbull I vc
1o_Groundwallr I bull 1 bull -------- Tranafom--~ )( Monltol1ng Well Location bull ~ i~ L------------ - iriaam111lJleLlquldsS1Pl9 middot~ -------middotmiddotca
1Guideline EluleedllllC8 (VCHC) ~ i- - - - - - - - - lllP ~-Miii( I ~ UiiSA~ - - oodrulle p~ bull - - - - i T - - i t ) ~- I t W L - - -
1 ------T L Jmiddot-J bull ~ SWlf9 ~ FaclltY Oe_a Grounclwabullr 1 I I ~-- 1 I MWAZ
r - - Weter Tl9bull811t n - _ - )( l)( Monitoring Well-Not Smlpled in GWME bull 11ALGr12 car u_L~~-------j- ___ _____ _ -middot
HPP r - - bull - bull - - ~ P~ -~ ~1middotHoulampt------1- WlllD on 0-
PCE uglL UQL
TCE uglL uglL OCE UOl1 In
vc UOl1 UQL
t HalJS9 ~ I t- ~ ~ RESAD
_____ l ______ l-~ l----~ 0I ~---J ClllPalt
I )( AX Om 100m
Oenolel Compound --111e===---c=11Concentnltion Rlld Denotea shyApprox ScaleSorel1g C~llril
Exceedance -OenotM Former Hila lnduatries Sill Boundary (northMn portion)D D
Figure 11 - Chlorinated Hydrocarbon Exceedences in Groundwater 2013-2014 (dashed line represents location of cross-section presented in Figure 12)
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
38
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
- - -- - - -
-----
AEC Environmental A EEi ~ ltONgtULoiNG OMPANr
SITE Ew
Fill
POORAKA FORMATION
G roundw a ter L o e (N o v 2013)
- - - d- a1 q fernferre
nfe rfed Grovndw~Fow__lplusmnJm--shy
~ --shy
__ W e ll Scree n
Clays of KESWICK CLAY FORMATION - Inferred Confining Bed for Q1 Aquifer
-20 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Approximate Distance (m)
Figure 12 - East-West Conceptual Hydrogeological Cross Section
Construction Environmental Management Plan Audit Area 1 (September 201 5) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
39
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental ~ P CONgtulT NG COMPAN
423 Site Condition - Soil Vapour
Volatile chlorinated hydrocarbon impacts have been recorded in soil vapour over the solvent plume located along the northern boundary of the site As presented in the risk assessments (summarised in and attached to the AA 1 ESNSRA and DRA reports) and summarised in Section 324 the results
suggest there are no major risks to future site occupants for the proposed site use The risk assessment also concluded that the level of risk posed to workers in service trenches up to 1Sm bgl (construction and maintenance) and within basement excavations up to 3m is considered acceptable
Whilst it is considered unlikely that groundwater will be exposed during development works (gt4m
bgl) it is noted that exposure to chlorinated hydrocarbons via direct contact and volatile chlorinated hydrocarbon vapour may result if this occurs See Section 62 for further guidance relating to the interception of impacted groundwater
424 Site Condition - General
Materials and infrastructure that may be identified during civil works include
bull Ashy fill material see Figure 8 and Photograph 1
Photograph 1 - Example of ashy fill material Photograph 2 - Example of ashy fill lens (Area F)
bull A suspected former brick-lined well (Reference P18BW) in the footprint of the former Maintenance Workshop see Figures 9 and 10 and Photograph 2
Photograph 2 - Pit 18 brick-lined well
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
40
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
AEC Environmental AGREENCAP CONSULTING COMlAr
bull Odorous material along the northern boundary of the site relating to impacts associated with former in-ground pits in the north east corner of the former Ironing Tables Workshop footprint and north west corner of the site the former Press ShopAuto Press footprint see Figure 10
bull Potential voids in the footprint of the former Woodroffes Building see Figure 10 Such voids
were not identified in further assessment works
bull Potential remnant structuresvoids in the footprint of the former Clotheslines Building (associated with tram access tunnels) see Figure 10 In-ground infrastructure was removed
during demolition works
bull Any other potential in-ground structures that have not been identified during demolition and assessment works
Construction Environmental Management Plan Audit Area 1 (September 2015) Portion of Former Hills Industries site (Version 3698AA1CEMP01) (Ref- 3698)
41
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