Environmental Effects Report Pty Ltd, Asphalt Plant... · Postal Address PO Box 651 Burnie TAS 7320...

ABN: 97 107 517 144 ACN: 107 517 144 80 Minna Road PO Box 651 Heybridge TAS 7316 Burnie TAS 7320 Ph: (03) 6431 2999 www.esandd.com.au

Environmental

Effects Report

Roadways Bridgewater

Project No: 7092

Date: August 2020

Document Control

Prepared & Published by: ES&D

Version: Review

File: 7092

Contact: Rod Cooper

Phone No: (03) 6431 2999

Prepared For: Roadways Pty Ltd

Version: Date:

DRAFT 1 M Atkinson ES&D 3/04/2020

REVIEW R Cooper ES&D 8/04/2020

DRAFT 2 M. Atkinson ES&D 14/04/2020

REVIEW B Harpley ES&D 17/06/2020

FINAL M. Atkinson ES&D 25/06/2020

FINAL V2 M. Atkinson ES&D 23/07/2020

This report has been prepared, based on information generated by Environmental Service and Design Pty Ltd from

a wide range of sources. If you believe that Environmental Service and Design Pty Ltd has misrepresented or

overlooked any relevant information, it is your responsibility to bring this to the attention of Environmental Service

and Design Pty Ltd before implementing any of the report’s recommendations. In preparing this report, we have

relied on information supplied to Environmental Service and Design Pty Ltd, which, where reasonable,

Environmental Service and Design Pty Ltd has assumed to be correct. Whilst all reasonable efforts have been made

to substantiate such information, no responsibility will be accepted if the information is incorrect or inaccurate.

This report is prepared solely for the use of the client to whom it is addressed and Environmental Service and Design

Pty Ltd will not accept any responsibility for third parties. In the event that any advice or other services rendered by

Environmental Service and Design Pty Ltd constitute a supply of services to a consumer under the Competition and

Consumer Act 2010 (as amended), then Environmental Service and Design Pty Ltd’s liability for any breach of any

conditions or warranties implied under the Act shall not be excluded but will be limited to the cost of having the

advice or services supplied again. Nothing in this Disclaimer affects any rights or remedies to which you may be

entitled under the Competition and Consumer Act 2010 (as amended). Each paragraph of this disclaimer shall be

deemed to be separate and severable from each other. If any paragraph is found to be illegal, prohibited or

unenforceable, then this shall not invalidate any other paragraphs.

Contents

Executive Summary ............................................................................................................... 1

1 PART A - Proponent Information ..................................................................................... 2

2 PART B- Project Description ............................................................................................ 3

Description of Project ............................................................................................................ 3

Map and site plan .................................................................................................................. 5

Proposal location ................................................................................................................... 6

2.3.1 Climate details .......................................................................................................... 7

2.3.2 Zoning........................................................................................................................ 8

2.3.3 Geology ..................................................................................................................... 8

Rationale and Alternatives .................................................................................................... 9

Planning information ............................................................................................................. 9

Existing activity ...................................................................................................................... 9

3 PART C - Potential Environmental Effects ...................................................................... 10

Air Quality ............................................................................................................................ 10

Water Quality ...................................................................................................................... 12

Noise Emissions ................................................................................................................... 15

Solid Wastes ........................................................................................................................ 15

Environmentally Hazardous Substances ............................................................................. 16

Natural Values ..................................................................................................................... 16

Weeds, Pests and Pathogens .............................................................................................. 18

Greenhouse Gas Emissions and Climate Change ................................................................ 18

Site Contamination .............................................................................................................. 18

Other Off-site impacts ......................................................................................................... 18

Environmental Impacts of Traffic ........................................................................................ 18

Monitoring ........................................................................................................................... 19

Decommissioning and Rehabilitation .................................................................................. 19

4 PART D - Management Commitments ........................................................................... 19

5 PART E - Public Consultation ......................................................................................... 20

Appendix 1 – Stack Test ................................................................................................................ 1

Appendix 2 – Hazardous Chemical Register ................................................................................... 3

Appendix 3 – Traffic Management Plan ......................................................................................... 5

List of Tables Table 1 – Proponent information ................................................................................................................ 2

Table 2 – Consultant Details ......................................................................................................................... 2

List of Figures Figure 1 Site map .......................................................................................................................................... 6

Figure 2 Average wind rose for Hobart ......................................................................................................... 7

Figure 3 Zoning .............................................................................................................................................. 8

Figure 4 Stack location ................................................................................................................................ 11

Figure 5 - Typical liquid effluent ................................................................................................................. 13

Figure 6 Contour drain and settling ponds ................................................................................................. 14

Figure 7 TasVeg 3.0 ..................................................................................................................................... 17

7092 Roadways Bridgewater EER 1

Executive Summary

Roadways Pty Ltd are applying to increase the production of their asphalt plant located in

Bridgewater. The current permit allows 50,000 tons of asphalt to be produced per year and the

applicant is seeking to increase production to 70,000 tons per year.

The asphalt is produced on a supply and demand basis and is therefore likely to have peaks of

production when large batches are required.

The plant does not require upgrade to be able to meet increased demand and production. The

plant is located adjacent to an existing quarry and between 1.3km and 1.7km to residential

sensitive receptors making it an appropriate location for the intensification to occur.

The intensification of the use will not alter potential environmental issues. The intensification

requires the site operate for a longer period of time, not at a higher rate of production. Potential

environmental issues will be managed by the current management systems.


1 PART A - Proponent Information

Table 1 – Proponent information

Entity of proponent Ian Harrington Group

Name of proponent Roadways Pty Ltd

Registered Address 134 Midlands Highway, Bridgewater, 7030

Postal Address P.O. Box 303 Glenorchy 7010

ABN number 28 009 485 812

CAN Number N/A

Site Contact Syd Prickett

Telephone number 0437 104 970/03 6271 3500

Email [email protected]

Environmental Service and Design were engaged to prepare this Environmental Effects Report

(EER). Details are provided in Table 2.

Table 2 – Consultant Details

Organisation Environmental Service & Design

Consultants R. Cooper, M. Atkinson

Address 74 Minna Road Heybridge TAS 7316

Postal Address PO Box 651 Burnie TAS 7320

Contact R. Cooper

Phone 0407 421 486

Email [email protected]

mailto:[email protected]


2 PART B- Project Description

Description of Project

The proposal is an increase in production for the existing asphalt batch plant on the Midlands

Highway near Bridgewater.

The operation of the plant is as follows:

• The hotmix plant is fed from stockpiles of aggregates via a conveyor from cold feed bins located on the south side of the plant.

• The aggregates pass through a natural gas dryer and stored in hot bins before being weighed into batches for the production of asphalt.

• The bituminous products are introduced to a hopper and blended with the base media (aggregates) and the product is then ready for delivery.

• The trucks are loaded with the hotmix (asphalt blend) and transported off site to the road/worksite for use. Trucks arriving on site to be loaded with hotmix will line their trays with vegetable oils to improve the unloading procedure at the site they deliver to.

On occasion one of the following lists of material is added to the hotmix on client request

• lime,

• sassawax,

• fine ground limestone (different to lime),

• pelletised cellulose fibre,

• modified polymer,

• crumbed rubber and

• crushed glass can be added into the hotmix on clients request.

The lime and crushed glass are the only items stored on site.


The increase in production does not result in an increase in noise output as the plant rate does

not increase. The increase in production is achieved by an increase in production hours. Similarly,

the wastewater generation rate does not increase, only the time period and so treatment

systems will not suffer shock loads or a decrease in efficiency.

The plant has an existing wet scrubber in place to eliminate a significant amount of potential

pollutants from air emissions.

As the plant is already in operation the timeframe for increased production is dependent upon

the issue of the relevant permits and future production demands.

Applicable acts associated with the plant

• Land Use Planning and Approvals Act 1993

• Environmental Management and Pollution Control Act 1994

• Mineral Resources Development Act 1995

• Water Management Act 1999

• Water Management Regulations 2009

• Weed Management Act 1999

• Weed Management Regulations 2007

• Threatened Species Protection Act 1999

• Aboriginal Heritage Act 1975

• State Policy on Water Quality Management 1997

• Environment Protection Policy (Air Quality) 2004

• Environment Protection Policy (Noise) 2009

• National Greenhouse and Energy Reporting Act 2007

• Weed and Disease Planning and Hygiene Guidelines 2015

The activity is currently a level 2 under EMPCA and the increased production to 70,000 tons will

keep the activity to a level 2 under EMPCA.

The current permit allows 50,000 tons of asphalt to be produced per year. The applicant is

seeking to increase production to 70,000 tons per year. The asphalt will be produced on a supply

and demand basis and is therefore likely to have peaks of production when large volumes are

required.

Operating hours of the site will generally be within 0630 – 1600 hours on each day of the week.

On occasion when a large batch is ordered increased production time will be required. The nature


of the ordering of batches means it is difficult to say how often increased production time will be

required.

The site can operate 24 hours a day Monday to Sunday, depending on the volume of hotmix that

is required, so it will be a rare occurrence. The noise requirements stated in EPN 8061-1 are

complied with at all operating times.

The maximum production rate is 120 tons of hotmix per hour however, the plant does not always

produce at this rate.

It must be noted that the increase in production is demand driven by customer volume and time

requirements. The rate of production remains constant whilst the hours of production expand

to meet increased demand.

Map and site plan

The facility is located on the northern corner of 314 Midland Highway with a property of ID of

3411200 and title reference of 170481/1. It is on a shared site with a Boral quarry located in Figure 1

below.

The landowner is Boral with whom the Ian Harrington Group (Roadways) have a lease agreement

with.


Figure 1 Site map

Proposal location

The asphalt plant is an existing activity operating on the northern corner of the Boral quarry at

Bridgewater (Figure 1). To the north is the Jordan River which forms the northern boundary of

the site and flows into the Derwent River to the south.

There is farmland on the northern side of the Jordan River. Figure 1 shows that the nearest

sensitive receptors (residences) to the site are 1350m to the north east and 1700m to the south.


The current use of the site includes the existing asphalt plant. No intensification or plant upgrade

is required to achieve the proposed production increase which results in no change to the existing

visual or environmental impacts.

2.3.1 Climate details

Figure 2 Average wind rose for Hobart

Average annual rainfall for the Hobart area is 612mm with average annual temperature

maximum of 17.0 oC and minimum of 8.4 oC. The positioning of the site to sensitive receptors

shows that the only potential risk could occur during a 1 in 20-year storm event impacting the

Jordan River and Derwent estuary. Measures are put in place discussed in section 3.2 to cover

any risk.


2.3.2 Zoning

Figure 3 Zoning

Site zoning from the Tasmanian Interim Planning Scheme shows that site is within the General

Industrial zone. Adjoining land is within the General Industrial and Rural Resource zones.

Dwellings, and residentially intended land zones are over 500m distance in all directions. No

other sensitive uses are located nearby

2.3.3 Geology

The MRT geological map shows that the area is underlain with consolidated and unconsolidated

tertiary sediments. There is an erosional line between the Jordan River and the site.


Rationale and Alternatives

The rationale for the increased production on the existing site is to meet future demand for road

construction materials in Tasmania. Roadways Pty Ltd has undertaken extensive consultation

with local councils and state government and are aware of multiple large-scale roadworks

planning. The demand for the asphalt is expected to increase beyond the current permit limit of

50,000 tons within a short period of time.

The impacts of asphalt plants are reduced by increasing production at the existing plant due to

the proximity to the Boral quarry. The carbon footprint of the current and expanded plant is

significantly lower than relocation or construction of a second plant.

No alternative sites with access to the main distribution road network, remoteness from sensitive

receptors and the existing supply of essential materials such as sand and aggregate have been

able to be identified.

Planning information

CT170481/1 is located within the General Industrial Zone. The proposal is for intensification of

an existing land use, Manufacturing and Processing (asphalt plant – Level 1 to Level 2 operation).

The proposal is subject to the discretionary assessment process under the Brighton Interim

Planning Scheme.

The site is covered by the Brighton Industrial Precinct Overlay. The site also contains sections of

land to which the Bridgewater Quarry overlay is applicable and some areas of low landslip risk.

The area to be developed is not within the overlay mapping for the Waterway and Coastal

Protection Code.

Existing activity

The site is currently regulated via EPN 8061/1 which was updated in 2012. Roadways commit to

reviewing the current environmental management plan in line with any updated conditions of

the EPN.


There are have been no public complaints recorded in the current register and no known

breaches or contraventions of the current EPN or environmental law.

3 PART C - Potential Environmental Effects

Air Quality

The existing wet scrubber system is the correct size for the proposed increase production and

has the capacity to scrub for the additional time required. Air emissions from the site have not

had a negative impact on the surrounding vegetation (as seen in section 3.6) which is

predominantly farmland, grassland, and the Boral quarry. An increase in the hours of production

to meet increased demand coupled with the capacity of the existing scrubber is very unlikely to

have a negative impact.

Due to the plants location and distance to sensitive receptors the air emissions from the site are

very unlikely to have a negative effect.

The activity has a point discharge, scrubber which is located on Figure 4.


Figure 4 Stack location

The asphalt plant is using high grade raw materials that produce less air emissions that low-grade

materials. The emissions are scrubbed with storm/wastewater from the sediment ponds and

discharged through the stack.

In accordance with the Environment Protection Policy (Air Quality) 2004, the site is following the

waste avoidance hierarchy by firstly avoiding air emissions where possible, treating what can be

treated and as a final option disposal.

A stack emissions test conducted in 2010 by Millen EMS, shows that the emissions from the stack

are, on average, less than 100 mg/m3 and meet the requirements of the Environment Protection

Policy (Air Quality) 2004. The stack test is attached as Appendix 1

The impact of dust emissions is mitigated by the wet scrubber. The stack is a single point

discharge where dust is likely to be produced. There is also potential for dust emissions from the

stockpiles on site during windy days.

The process of heating bitumen can create an odour. However, it is not considered to be able to

impact on the closest sensitive receptor due the distance (over 500m as shown in section 2.3.2).

Stack


Water Quality

The Jordan River forms the boundary of the site to the north as shown in figure 1. The Jordan

River flows into the River Derwent in a south east direction. The Jordan River is approximately

70m North There are no other surface waters, natural wetlands, or estuaries within 1000m of

site.

The plant is existing on the site and is a previously approved activity. The increase in production

volume will have minimal effect as controls are in place under the current EMP and regulated

under the current EPN.

Water required to fill the settlement ponds is sourced from the Boral mains supply. Once

settlement ponds are filled the system is then a ‘closed loop’ only needing to be topped up as

required from the Boral main as water evaporates.

There is little liquid effluent coming from the site. Figure 5 below shows the typical liquid effluent

produced during the operating period. The rate of liquid effluent leaving the plant will not

increase, however the duration of liquid effluent will increase. This will help ensure that the

wetland system is not overloaded with additional effluent.

It is unlikely there will be impacts of the ecology of the river as it is extremely unlikely there will

be water entering the system.


Figure 5 - Typical liquid effluent leaving site

Figure 6 shows a contour drain constructed between the asphalt plant and the Jordan River to

collect any wastewater of effluent. The drain is designed and constructed to cope with winter

rain events and directs all run-off water to the settling ponds before the water is re-routed to use

in the scrubbers of the stack system. The sediment at the bottom of the ponds is re-used by the

Boral quarry which is a substantial reduce reuse strategy.


Figure 6 Contour drain and settling ponds

The Derwent Estuary Program indicates the site is in the middle reaches of the Derwent Estuary.

Information from the Derwent Estuary program suggests that the main potential source of

contamination from this site is stormwater runoff.

The settling ponds have a capacity of 160m3, 216m3, 112m3 and 500m3. This is a combined total

holding capacity of 988m3.

The existing settling ponds have sufficient capacity to cope with a 1 in 20-year rain event. Data

from the Bureau of Meteorology shows that the rainfall intensity of the area for a 24-hour storm

is 3.21 mm/hour. The site is approximately 1000m2 so over a 24-hour period there would be

77.04 m3 of water going into the settling ponds from the roadways site. This is considerably under

the size of the settling ponds capacity.

In the case of above average rainfall the settling ponds are checked for discharge. If there is water

discharging from the ponds to the Joran River a check sample is taken to ensure that a high

sediment load is not impacting the Derwent Estuary.


Monitoring of the settlement ponds is undertaken by Boral. They monitor pH, particulate matter,

and hydrocarbons.

Noise Emissions

A noise assessment has not been conducted for the site nor has one been requested by the EPA.

There have not been any cases of noise complaints from the public during over 28 years of

production at the asphalt plant. The only case a noise assessment is to be undertaken is if the

Director of the EPA requests it.

The operating hours off the site are typically within 0630 - 1600 hours every day. On occasion

when a large batch is ordered increased production time will be required. These hours are less

than the nearby Boral quarry who operate under the Quarry Code of Practice.

The major noise sources on the site are from the following

• Dust fan – 104.4 dB

• Gas burner 100.2 dB

• Asphalt loading bay 97.2 dB

• Dryer 94.6 dB

• Lab marshall compactor 94.8 dB

With over 1000m to the nearest residence the combined noise emissions will be less than 46dB (Noisetools.net). This is unlikely to have an impact on the nearest residences.

Solid Wastes

The production of solid waste cannot be avoided during the asphalt process. The only solid waste

produced is from the settling ponds, which is solids collected during the wet scrubbing process,

and this will increase because of the increased production. All solid waste from the settling ponds

is recycled and re-used by the Boral quarry.


Additionally, Roadways clean out the scrubber each day using a mixture of aggregates consisting

of 7mm, 14mm and 20mm as well as dust. This mixture is placed into a pile with the intent to be

re-used.

Environmentally Hazardous Substances

The site has some environmentally hazardous substances in use. The quantity and type stored on

site is found in Appendix 2.

Spill kits are located on site with all employees receiving training in their use. In the event of a

spill the person finding the spill carries out the following actions:

• Alert site management that there has been a spill and the estimated volume.

• In the event of a minor spill the employee will clean up and place the contaminated material in the designated clean up bag.

• The material is removed from site by a suitably qualified waste contractor.

• In the event of a larger spill the employee is to bund the spill to prevent further exposure to the environment.

• A suitably qualified waste disposal company is contacted to clean up and remove the contaminated material

The only controlled waste that could occur at this site is contaminated soil from a spillage of environmentally hazardous material.

Each employee undertakes spill management training specific for the Bridgewater site.

All spills are recorded in the environmental incident register.

Natural Values

TasVeg 3.0 (Figure 7) shows that the site is entirely covered by extra urban miscellaneous

vegetation. There are no endangered species within 2 km of the site.


Figure 7 TasVeg 3.0

The proposed increase in production does not require clearing of vegetation for extra plant or

machinery.

There will be increased traffic movements stemming from the increased production. This has the

potential to increase the risk to animals on the road network within and external to the site.

There are incidents of noted fauna located on roadways that are likely to be impacted by the

intensification of the site. Species of fauna found on these roads are the eastern barred

bandicoot, the Tasmanian devil, the masked owl, and eastern quoll. All incidents were reported

prior to 16/01/2018 and are available to view on TheLIST.

The increased traffic movements from the site will be at a maximum of 23 extra trucks per day

(as per appendix 3). This is a minor increase in total traffic of the area and the increase in risk to

associated fauna is negligible.

There are no known natural or geoconservation values within 1000m the site, hence the increase

in production will have no detrimental effect.

Site


Weeds, Pests and Pathogens

The only risk of weeds, pests or pathogens is from the wheels of the trucks that enter and exit

the site to transport the product. Trucks are washed down on site as per EPN8061/1 with all wash

down waste going into the settlement ponds. Due to the nature of asphalt production process

and the product produced on site there is no requirement for a phytophthora management plan.

Greenhouse Gas Emissions and Climate Change

This process uses best practice environmental management. By locating within an existing quarry

operation this minimises traffic movements to and from site for raw materials and reduces the

carbon footprint. This significantly reduces distance a vehicle must travel to bring sand and gravel

to the site which in turn reduces the CO2 discharged when travelling. This is in conjunction with

the proponent using modern, well maintained vehicles for offsite transport of the final product.

The site uses natural gas as the main energy source which again lowers the CO2 discharge that

other energy sources can produce.

Roadways Pty Ltd are committed to reducing transport emissions by minimizing travel distances

and using modern efficient plant and equipment throughout the life of the operation. Which

meets the relevant points in Tasmania’s climate change action plan 2017-2021.

Site Contamination

There are no known historic site contamination issues.

Other Off-site impacts

There are no other off-site impacts.

Environmental Impacts of Traffic

A traffic impact assessment was undertaken by Mr. Chris Martin of CSE Tasmania. He states that

the increase in production has the potential to increase the vehicle movements to the site by

40%. However, there is a new and high standard road infrastructure in the vicinity of the asphalt

plant. Due to this the increased vehicle movements will not have a detrimental effect on safety

or the road network.


Traffic Impact Assessment Report is attached as Appendix 3.

Monitoring

Currently no monitoring is required by the current EPN. However, Boral conduct monitoring of

the settlement ponds under their monitoring program for pH, particulates, and hydrocarbons.

Decommissioning and Rehabilitation

Decommissioning of the site will include the removal of all infrastructure associated with the

asphalt plant. Rehabilitation of the site will be in line with the Boral Quarry rehabilitation where

the plant is located.

4 PART D - Management Commitments

Number Commitment Reference Completion

Date Person

Responsible

1

Undertake annual audits of Workplace Health and Safety Act

1995 and the Workplace Health and Safety Regulations 1998 and the

“Requirements for onsite personnel.”

Section 2.1 Ongoing S. Prickett

2 EPN, EMP and existing systems to

checked for suitability Section 3.1 At approval S. Prickett/EPA

3 Organise a noise assessment to be if

requested. Section 3.3

30 days after initial late operation

S. Prickett

4 Ensure spill kits are on site and

stocked. Section 3.5 Ongoing H Allwright

5 Spill management training is undertaken by all employees

Section 3.5 During

employee site induction

H. Allwright

6 Record all spill in an environmental

incident register Section 3.5

At time of incident

H. Allwright

7 The DRP will conform with the Boral

quarry decommissioning plan Section 3.13

30 days before closure

S. Prickett


5 PART E - Public Consultation

Consultation has occurred with both local and state government regarding impending roadworks.

The projected roadworks will require larger volumes of asphalt than can be produced under the

current permit limit and therefore an increase in output is requested.

Public consultation has not yet been conducted will occur as part of the DA process.

6 Refences

Noise tools calculator accessed from http://noisetools.net/noisecalculator

http://noisetools.net/noisecalculator

Appendices

Appendix 1 – Previous Stack Test

SUMMARY REPORT ON ENVIRONMENTAL MONITORING

STACK EMISSION MONITORINGBridgewater Depot

March 2010

for

Roadways Pty Ltd

MILLIN EMS PTY LTDABN 35 090 618 241

1st Floor 5 Morrison Street Hobart TAS 7000PO Box 83 Battery Point TAS 7004T: 03 6231 9690 F: 03 6231 9695

E: [email protected]

Roadways Pty LtdRDWDep02 - Bridgewater

Millin EMS/ RDWDep02 January 2010 Page 1 of 5

TABLE OF CONTENTS

1.0 Introduction ...........................................................................................22.0 Scope of Works.....................................................................................23.0 Works Carried Out ................................................................................34.0 Background Information ........................................................................3

4.1 Sources of Air Pollution .....................................................................34.2 Operation of the Hotmix Plant............................................................3

5.0 Results ..................................................................................................46.0 Conclusion and Recommendations.......................................................5

Attachment 1: Report on Atmospheric Emissions Scrubber Stack, Roadways Bridgewater by LEC Environmental



1.0 Introduction

This summary report has been prepared in response to a request from Roadways Pty Ltd for environmental monitoring at their Bridgewater Depot.

Roadways Pty Ltd operates from three principal depot sites in Tasmania, including a mixed use depot at Wivenhoe near Burnie in the north of the State. The mixed use depot has a range of activities that potentially impact on air, noise, water quality and soils and groundwater, as well as potentially impacting on the social amenity of surrounding areas, including nuisance noise, odours, lighting, traffic movements and the like.

Millin EMS was previously engaged to inspect each of the three depot sites, to review the licence and approvals and to consider an outline of monitoring requirements likely to address future environmental monitoring requirements of the sites. This review was presented in a report of June 2009.

Further to our report and discussions during mid-2009, Millin EMS was commissioned to arrange for an investigation of air quality at the Bridgewatersite. The objective of the assessment was to determine the concentration of particulates from the scrubber stack with respect to emission limit guideline values.

LEC Environmental were engaged to conduct stack emission testing. This summary report presents the results of this testing. Detailed measurements can be found in LEC Environmental ‘Report on Atmospheric Emissions Scrubber Stack, Bridgewater Depot’ dated 3 March 2010, included in Attachment 1.

2.0 Scope of Works

The scope of works for this report includes results of Hotmix scrubber stack emission monitoring at Bridgewater and comprised the following tasks:

Monitoring stack emissions under two plant operating conditions for:o Total Particulates, and Moisture (in duplicate) (i.e. 4 tests total)o Oxygen, Carbon Dioxide measurements by instrument during

the total particulates testso Nitrogen Oxide, Nitrogen Dioxide, Sulphur Dioxide & Carbon

Monoxide measurements by instrumento Temperature measurements during the total particulates testso Gas Velocity & Volume Flow Rate Calculations (based on one

set of measurements) Report detailing methods, procedures and results.



The test is for total particulates, recovered on a glass fibre filter paper, using Advantec GC50. Particles retention is less than 0.6 micron (no differentiationbetween total particulates and PM10 as the larger particles are expected to be removed in the scrubber).

3.0 Works Carried Out

Stack emissions testing was conducted at Bridgewater on the morning of 16 February 2010. Testing was conducted in accordance with Australian Standards and Victorian EPA methods.

Two tests were conducted, for each test the following measurements were taken:

Velocity of gases in the stack; Particulate measurements; Moisture measurements; Stack temperature; Gas concentrations (CO2%, O2%, COppm, NOppm, NO2ppm

No measurements for sulphur dioxide were reported.

4.0 Background Information

4.1 Sources of Air Pollution

Air pollution issues (i.e. beyond the boundary of the premises) from bitumen operations include coarse dust, fine particles, gaseous pollutants and odours, detailed as follows:

Potential coarse dust and fine particulate sources include vehicle movements, wind-blown from site and materials storage, materials handling, screening, aggregate drying (usually subject to emission control), and truck loading.

Potential gaseous pollutant emission sources include drying, bitumen storage, mixing and truck loading.

Potential odour sources include truck loading and gas leaks.

4.2 Operation of the Hotmix Plant

The hotmix plant is fed from stockpiles of gravel via a conveyor from bins located on the south side of the plant. Bituminous products are introduced to



a hopper and blended base media for supply of product. The hot air stream is drawn off via a wet scrubber prior to discharge to the atmosphere via a stack. The water supply for the wet scrubber is a two stage system of settlement basins located adjacent to the plant. Water is introduced to the scrubber via a recirculation pump.

The return water with entrained fines from the scrubber enters the first settlement basin before entering the pump well located at the far corner of the basin.

5.0 Results

Details of the stack emission testing are outlined in the attached report by LEC Environmental (Attachment 1).

Results indicate that the total particulate concentration of stack emissions was 100.1 mg/m3 and 92.2 mg/m3 for Test 1 and Test 2, respectively. These tests were carried out under normal operating conditions using recycled water from the wet scrubber.

Comparison of results of the two tests with guidelines indicated that the particulate emissions from the scrubber stack was close to the 100mg/m3

guideline level provided by the Environment Protection Policy (Air Quality) 2004 for in-stack concentrations. The averaged result was within the guideline concentration value.



6.0 Conclusion and Recommendations

Under normal operating conditions, the stack emissions were at about the guideline levels for in-stack concentrations (Environment Protection Policy (Air Quality) 2004).

It is likely that there would be variation in concentrations of particulates for varying operational conditions, which could result in the emission limit guideline value being exceeded.

Given that the measured emissions were close to or equal to the guideline value for particulate emissions, it would be prudent to:

Carry out investigations of scrubber operation to assess potential for improved performance;

implement measures for improved fines settlement in the water recirculation system.

Yours Faithfully

Signed: …………………………………………

Philip Millin FEIANZ, MAIGB.Sc (Hons) GDipNatRes

Dated: …………………………………………

For MILLIN EMS PTY LTDABN 35 090 618 241

ATTACHMENT 1: Report on Atmospheric Emissions Scrubber Stack, Roadways Burnie by LEC Environmental

Appendix 2 – Hazardous Goods Register

DG Manifest Roadways Bridgewater Asphalt Plant Revision 3.1

Re-issued May 2020

DANGEROUS GOODS MANIFEST Asphalt Plant (located at Boral Quarry)

1 Parkholme Drive, BridgewaterTas. 7030

Emergency Contacts

Name Position Contact

Bill Abbott Chief Executive Officer Work 03-62713500 A/H 0429 848 182

Henry Allright

Maurice Bradley

Asphalt Plant Manager

Technical Manager Radiation Safety Officer

Work 03 62637784 A/H 0409 817 557

Work & A/H 0400 914 935

(1) Bulk Storage & Packaged Dangerous goods

Location Tank ID. Name Class UN No.

PG Type Capacity

Southside of Control room

BR 1 BR 2

Elevated Temperature Liquid, N.O.S

9 3257 III Above ground

(ag)

89,930 L

“ “

Southside Control room

BR 3

Diesel

Hydrated Lime

C1

8

1202

3262

III

Steel tank

a/g

Wood boxes 10k

bags

5,000 L

10,000 kg

Workshop

Acetylene 2.1 1001 Cylinder 70 L

Workshop

Oxygen 2.2 1072 Cylinder 70 L

Flammable goods Store

LPG Gas 2.1 1978 Cylinders 370 L

Flammable goods Store

Packaged flammable

liquids

3 II & III

Various container

s Tin &

plastic

400 L

DG Manifest Roadways Bridgewater Asphalt Plant Revision 3.1

Re-issued May 2020

NUCLEAR DENSITY GAUGE Troxler 4640B thin lift Asphalt Nuclear Density Gauge

Gauge Source Location Legislation Class 7

Type A Package

Radiation Source

Material Cs-137

Activity 0.3GBq

Southern side of Asphalt

Plant next to shipping

container

Australian Radiation

Protection and Nuclear

Safety Regulations 1999

ARPANSA Code of

Practice & Transport

Safety Guide

Appendix 3 – Traffic Impact Assessment

134 Midlands Highway Roadways

Bridgewater Asphalt Plant Expansion

Parkholme Drive

Traffic Impact Assessment

PREPARED BY CHRIS MARTIN FIEAust, NPER3. Senior Civil Engineer CSE Tasmania Pty Ltd Tasmanian Building Act Accreditation Number: CC4109 V.

DATE 5/6/20

2 Parkholme Drive Asphalt Plant Expansion Traffic Assessment CSE Tasmania Pty Ltd

INDEX 1 Introduction & Background........................................................................ 3

1.1 Statement of Qualifications and Experience ....................................... 4

1.2 Project Scope ..................................................................................... 4

2 Assessment Criteria .................................................................................. 5

3 Existing Condition Site Investigation/Survey ............................................. 5

3.3 Road Safety Performance ................................................................... 6

3.4 Sight Distances ................................................................................... 6

3.5 Intersection Geometry......................................................................... 6

3.6 Impact on the Road Network .............................................................. 6

4 Traffic Generation ..................................................................................... 7 5 Discussion ................................................................................................ 7

6 Recommendation ...................................................................................... 7


1 Introduction & Background The following report contains the Traffic Impact Assessment (TIA) for the Bridgewater Roadways Asphalt plant expansion, located off Parkholme Drive. The site is looking to expand current extraction rates from 50,000 cubic metres per annum to 70,000 cubic meters per annum.

Fig 1 Excerpt from Google Earth showing location of intersection.

Intersection Location

Asphalt Plant site


1.1 Statement of Qualifications and Experience This TIA has been prepared by an experienced and qualified Civil Engineer with significant experience in Traffic Impact Assessments and Road Safety Audits in accordance with the requirements of Council’s Planning Scheme and The Department of State Growth’s, A Framework for Undertaking Traffic Impact Assessments, September 2007. This TIA was prepared by Chris Martin. Chris’s experience and qualifications are briefly outlined as follows:

• Bachelor of Civil Engineering with Honours, University of Tasmania 1992

• 28 years professional experience as a Civil Engineer in infrastructure design

• Master of Business Administration (Technology Management) Latrobe University 2007

• Career experience includes design of many subdivisions, 2.5 years Council Engineer, 16 years in civil and structural consulting and 6 years in major infrastructure engineering positions.

1.2 Project Scope The project scope of this TIA is:-

• Review of the existing road environment in the vicinity of the site and the traffic conditions on the road network.

• Provision of information on the proposed development and its expected traffic movements and activity.

• Identification of the traffic generation potential and review of the impact of the increase in traffic on the road network capacity.

• Traffic implications of the proposal with respect to the external road network in terms of traffic efficiency and road safety.


2 Assessment Criteria With the access road shared with Boral Quarries coming direct onto a roundabout built with the Midlands Highway upgrade the usual assessment criteria do not apply. This asphalt plant has a high standard road junction in place design by DSG engineers during the highway upgrade.

3 Existing Condition Site Investigation/Survey The site inspection was performed by Chris Martin from CSE Tasmania Pty Ltd on the 9th of June 2020.

Parkholme drive commencing at the Bluemetal Drive roundabout – view to the east

Parkholme drive view from inside the gates to the west towards the roundabout.


3.3 Road Safety Performance Crash data provides valuable information on road safety performance. Existing road safety deficiencies can be highlighted through the examination of crash data, which can assist in determining whether traffic generation from the proposed development may exacerbate any identified issues. The Department of State Growth DSG accident database collects all accident data in the state from 2003. Crash data revealed that two heavy vehicles have collided at the roundabout on during daylight hours at 5pm on 6th of Dec 2019. First aid was required for the heavy vehicle occupants. The description of cause was classified as “cross traffic” suggesting that there was a failure of a vehicle to give way. This one instant is insufficient to indicate any design flaws with the roundabout.

3.4 Sight Distances As the asphalt plant is at the end of Parkholme Drive and it intersects with an existing roundabout sight distances are not an issue.

3.5 Intersection Geometry The Parkholme Drive/Bluemetal Drive intersection was constructed with the highway upgrade. There are no concerns with the geometery of the roundabout.

3.6 Impact on the Road Network Parkholme Drive and its intersections are of new construction. There are no concerns for impact on the road network or beyond as the vehicles join the highway at the relatively new interchange.


4 Traffic Generation

The operating hours of the asphalt plant are typically from 0700 – 1900hrs

Monday to Friday and 0800 – 1600hrs on Saturdays with some variations

depending on demand.

The asphalt plant expansion will result in an increased number of class 4 (i.e.

10m3, three axle trucks) and class 9 (i.e. 10m3, three axle trucks with an

additional 10m3 trailer) utilizing Parkholme Road. The proposal will see the

existing production rates of 50 000m3 per annum increased to 70 000m3 per

annum, thus resulting in up to 7000 class 4 vehicles, or 3500 class 9 vehicles

leaving this asphalt plant per annum. Predominant use of truck and trailer

combinations will see approx. 3500 truckloads out of the site each year.

It is likely that the product will be shifted from the site in campaigns assuming

about 25 truck and trailer loads removed in a day. This equates to 140 days

at 25 trucks per day. In reality the frequency of trucks could be controlled by

the loading rate – say 1 truck every 10 minutes when there is a major project

requiring asphalt. This could increase frequency to 48 trucks per day.

The predominant direction of truck movements will be to the south of the

asphalt plant access into the greater Hobart market with some larger

campaigns directing asphalt to Midlands Highway upgrades.

5 Discussion Increasing the tonnage output of Bridgewater Roadways Asphalt plant has the potential to increase truck movements by 40%.

Due to the new and high standard of road infrastructure in the vicinity of the

asphalt plant this proposed increase in use will not have a detrimental affect

on safety or the road network.

6 Recommendation The increase in truck movements will not affect recognized safety standards at the intersection or extending further afield on the network. The Traffic Impact Assessment does not identify grounds that would prevent the upgrade in tonnage from this operation.

Environmental Effects Report Pty Ltd, Asphalt Plant... · Postal Address PO Box 651 Burnie TAS 7320...

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