Water Quality Monitoring Plan (WQMP)...A 24.08.2016 Issued For Review S Watkins S Krol I Lambay B...

Water Quality Monitoring Plan (WQMP)

Project Name : Design and Construction of Onslow Marine Support Base

Project Location : Onslow, Western Australia

Client : Onslow Marine Support Base (OMSB)

Contract No : DnC OMSB Contract 20161116

Internal No. : MCE.0455

Prepared by:

Document No. MCE0455_PMP_004

Document Title Water Quality Monitoring Plan

Rev. Date Issue type Originator Review Approval

A 24.08.2016 Issued For Review S Watkins S Krol I Lambay

B 21.09.2016 Issued For Review S Watkins S Krol I Lambay

C 31.10.2016 Issued For Review S Watkins BMTO I Lambay

D 23.11.2016 Issued for Approval S Watkins BMTO I Lambay

0 07.12.2016 Issued for Construction S Watkins I Lambay I Lambay

1 13.12.2016 Revision S Watkins BMT JFA I Lambay

Document Number MCE0455_PMP_004 Document Name Water Quality Monitoring Plan Project Onslow Marine Support Base Date of Issue 07 December 2016

Client OMSB Revision 0

2 of 32

Table of Contents

1 Introduction .............................................................................................................................................. 4

1.1 General ............................................................................................................................................ 4

1.2 Project Background ......................................................................................................................... 4

2 Scope, Objective & Validity ...................................................................................................................... 5

2.1 Scope .............................................................................................................................................. 5

2.2 Objective ......................................................................................................................................... 5

2.3 Validity ............................................................................................................................................. 5

3 References ............................................................................................................................................... 6

3.1 Client and/or Contract specific procedures, documents, standards ............................................... 6

3.2 Maritime Constructions’ Project Specific Documents ..................................................................... 6

3.3 Acts, Regulations, Codes of Practice and Australian Standards .................................................... 7

4 Definitions & Abbreviations ...................................................................................................................... 8

5 Outline of Project ..................................................................................................................................... 9

5.1 Project Identification ........................................................................................................................ 9

5.2 Milestones ....................................................................................................................................... 9

5.3 Construction Program ................................................................................................................... 10

5.4 Site Lay-Out .................................................................................................................................. 10

5.5 Marine Activity Zone ...................................................................................................................... 10

5.6 Land Operations ............................................................................................................................ 11

5.7 Dredge Methodology ..................................................................................................................... 11

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

6.1 Existing Environment .................................................................................................................... 12

6.2 Potential Negative Impacts on Marine Environment ..................................................................... 12

6.2.1 Release of TBT’s ....................................................................................................................... 13

6.2.2 Water Clarity / Turbidity ............................................................................................................. 14

6.3 Water Quality Criteria .................................................................................................................... 14

7 Water Quality Management ................................................................................................................... 16

7.1 Monitoring Program ....................................................................................................................... 16

7.2 Monitoring Sites ............................................................................................................................ 16

7.3 Water Quality Monitoring Procedure ............................................................................................. 17

7.3.1 Plume Sketches ........................................................................................................................ 17

7.3.2 Site Photographs ....................................................................................................................... 17

7.3.3 Bund and Pipeline Inspection .................................................................................................... 17

7.3.4 Water Samples .......................................................................................................................... 18

7.4 Sample Regime ............................................................................................................................. 22

7.5 Records ......................................................................................................................................... 23

7.6 Reporting ....................................................................................................................................... 23

8 Annexure ................................................................................................................................................ 24

8.1 Beadon Creek Capital Dredge Area and Sediment Sampling Sites ............................................. 24

8.2 Contingency Chart ........................................................................................................................ 25



3 of 32

8.3 Overview of Work Areas and Monitoring Sites ............................................................................. 26

8.4 Standard WQM Record Sheet ...................................................................................................... 28

8.5 Plume Sketch ................................................................................................................................ 29

8.6 Example Sampling Regime Table ................................................................................................. 30

Table of Figures

Figure 1 - OMSB Proposed Development Area .............................................................................................. 4 Figure 2 : Marine Activity Zone ..................................................................................................................... 11 Figure 3 : Land activity zone ......................................................................................................................... 11 Figure 4 : Redefined area of TBT contamination in Beadon Creek .............................................................. 13 Figure 5: Water Quality Monitoring Requirement Outline Table ................................................................... 15 Figure 6 : Representation of Discharge Plume Sampling Points .................................................................. 19 Figure 7 : Fixed monitoring site map ............................................................................................................. 20



4 of 32

1 Introduction 1.1 General This document describes the intended Water Quality Monitoring Plan for the dredging and reclamation of Beadon Creek river sediments for the Onslow Marine Support Base (OMSB) Project in Onslow (WA) as further described in the Contract between Onslow Marine Support Base Pty Ltd and Maritime Constructions Pty Ltd. 1.2 Project Background Beadon Creek is a tidal inlet on the eastern side of the coastal town of Onslow, 1,390km north of Perth. The current Beadon Creek maritime facility is located approximately 550m south of the entrance to Beadon Creek and provides boating facilities for commercial fishing vessels, charter vessels, tugs, barges and recreational vessels. The Beadon Creek Maritime Facility is also regionally important for providing cyclone refuge for vessels along the Pilbara coast. The maritime facility in Onslow was originally designed for recreational, fishing and charter operations. However, extensive growth of the resources sector in the Pilbara region has led to increased demand for maritime support services and industries. As a result, the Department of Transport (DoT) released more land at the facility for development. The Onslow Marine Support Base will include the construction of a 204m of new wharf frontage, a single heavy lift crane-pad, laydown and car park facilities and the capital dredging of a berth pocket and turning basin immediately west of the existing channel. The dredged material will be used to create an additional land-backed wharf area immediately north of the existing lots. This capital dredging requires approximately 55,000 m3 of material to be reclaimed.

Figure 1 - OMSB Proposed Development Area

http://www.transport.wa.gov.au/imarine/onslow-facility.asp



5 of 32

2 Scope, Objective & Validity 2.1 Scope This Water Quality Monitoring Plan (WQMP) has been prepared to comply with the contractual requirements for the dredging works described in the contract between Onslow Marine Support Base Pty Ltd (OMSB) and Maritime Constructions Pty Ltd (MC), and is in compliance with the advice provided by the OEPA with respect to the environmental aspects of the dredging works. Furthermore this WQMP addresses the specific concerns the OEPA has raised with regards to the remobilisation of potential contaminants, particularly Tributyltin (TBT), into the water column of Beadon Creek. This WQMP covers all activities in relation to the monitoring and management of the water quality during preparation, execution and completion of the Project. 2.2 Objective The objective of this WQMP is to ensure that the preparation, execution and evaluation of the management of the water quality for the Project are carried out in a controlled and auditable manner and in line with the guidelines under the OEPA advice. The Objectives of this monitoring program are as follows:

To comply with the approved Dredging Environmental Impact Assessment (DIEA – BMT Oceanica & BMT JFA 2014) and the Department of Transport’s overarching Environmental Management Framework (EMF; BMT Oceanica 2016);

To identify whether the impacts on water quality in the vicinity of the active dredge area and disposal location and the general water-based works are local and temporary;

To identify any impacts on water quality in the vicinity of the active dredge area and disposal location and the general water-based works

To identify when a plume has the potential to cause adverse social and/or environmental impacts and to provide the opportunity to limit these impacts

Ultimately, the aim of the monitoring program is to ensure that there is minimal impact on the environment, including the avoidance of the loss of marine fauna and flora and maintaining water quality. 2.3 Validity The validity of this Water Quality Monitoring Plan starts from the approval date of this Plan by the independent third party verifier up to and including the completion date of the Project.



6 of 32

3 References This document should be read in conjunction with the Project’s Construction Management Plan (CMP), which is the over-arching plan that details the procedures and policies to be following in executing these works. References made in this document relate to the latest revision of the following documents: 3.1 Client and/or Contract specific procedures, documents, standards

REFERENCE DOCUMENT DESCRIPTION

LOI Letter of Intent – Agreement for the Design and Construction of the Onslow Marine Supply Base, Lot 13 Beadon Creek, Onslow, Western Australia, dated 04 July 2016

CONTRACT Contract No. Design and Construction of Onslow Marine Support Base 20161116 – including the Principal’s Project Requirements

DEIA Beadon Creek Maritime Facility, Capital Dredging Environmental Impact Assessment; BMT Oceania, 365_01_004/1_Rev6, April 2014

OEPA Notice OEPA Public Advice ref 13-283104 dated 28 April 2014

Notification of Dredging Department of Transport Memorandum to the Office of the OEPA notifying the commencement of capital dredging in Beadon Creek, dated 31/10/2016

3.2 Maritime Constructions’ Project Specific Documents

REFERENCE DOCUMENT DESCRIPTION

MCE0455_PMP_001 Construction Management Plan

MCE0455_PMP_002 Safety Management Plan

MCE0455_PMP_003 Environment Management Plan

MCE0455_PMP_004 Water Quality Monitoring Plan

MCE0455_PMP_005 Vessel Safety Management Plan (Ngurunderi)

MCE0455_PMP_006 Vessel Safety Management Plan (Carter)

MCE0455_PMP_007 Cyclone Management Plan

MCE0455_PMP_008 Employee Relations Management Plan

MCE0455_PMP_009 Site Organisation Chart

MCE0455_PMP_010 Site Induction

MCE0455_PMP_011 Dredging and Reclamation Management Plan

MCE0455_PMP_012 Communication Management Plan

MCE0455_WMS_001 Wharf Construction (Work Method Statement)

MCE0455_ITP_001 Inspection and Test Plan - Wharf Construction

MCE0455_ITP_002 Inspection and Test Plan - Dredging and Land Reclamation



7 of 32

MCE0455_PRM_001 Project Construction Program

MCE0455_PRA_001 Project Risk Assessment 3.3 Acts, Regulations, Codes of Practice and Australian Standards

Occupational Health and Safety

Western Australian Occupational, Health and Safety Act, 1984 (WA)

Occupational, Health and Safety Regulations, 1996 (WA)

Dangerous Goods Safety Act, 2002 (WA)

Australian Maritime Safety Authority Act, 1990 (Commonwealth)

Workers Compensation and Injury Management Act, 1982

Workers Compensation and Injury Management Regulations, 1982 (WA)

Western Australia Marine (Cert of Competency & Safety Manning) Regulations, 1983 (WA)

Building & Construction Industry Training Fund & Levy Collection Act, 1990 (WA)

Industrial Relations Act, 1979 (WA)

Environmental

Environmental Protection Act, 1986 (WA)

Environment Protection and Biodiversity Conservation Act, 1999 (Commonwealth)

Environmental Protection (Sea Dumping) Act, 1981 (Commonwealth)

Environmental Protection Regulations, 1987 (WA)

Environmental Protection (Unauthorized Discharges) Regulations, 2004 (WA)

Environmental Protection (Clearing of Native Vegetation) Regulations, 2004 (WA)

Western Australia Marine (Sea Dumping) Regulations, 1982 (WA)

Harbours and Jetties Act, 1928 (WA)

West Australian Marine Act, 1982 (WA)

Navigable Waters Regulations, 1958 (WA)

Aboriginal Heritage Act, 1972 (WA)

Conservation and Land Management Regulations, 2002 (WA)

Australian Standards

AS4997-2005 Guidelines for the Design of Maritime Structures

AS1657-1992 Fixed Platforms, Walkways, Stairways & Ladders – Design, Const. & Installation

AS2159-1995 Piling – Design and Installation

AS1554-2004 Structural Steel Welding (Parts 1 to 5) Maritime Constructions operates in accordance with Laws, Regulations and Australian Standards at all times.



8 of 32

4 Definitions & Abbreviations

DEFINITION DEFINITION

CONTRACT DnC OMSB Contract 20161116

PROJECT Design & Construction of the Onslow Marine Support Base

WORKS All of the Activities required to complete the PROJECT in accordance with the CONTRACT

ABBREVIATION DEFINITION

CMP Construction Management Plan

CSD Cutter Suction Dredge

EMP Environmental Management Plan

EPA Environment Protection Authority

ERP Emergency Response Plan

IMS Integrated Management System

ITP Inspection and Test Plan

MC Maritime Constructions

OHS Occupational Health and Safety

OMSB Onslow Marine Support Base

PASS Potential Acid Sulfate Soils

PRA Project Risk Assessment

TBT Tributyltin

WMS Work Method Statement

WQMP Water Quality Monitoring Plan



9 of 32

5 Outline of Project 5.1 Project Identification Project

Name Design & Construction of Onslow Marine Support Base

Location Onslow, Western Australia

Contract No. DnC OMSB Contract 20161116

Contract Manager Imran Lambay

Project Manager Sam Watkins Engineering Consultant

Name Aztec Analysis Pty Ltd

Design Manager David McKay Client

Name Onslow Marine Support Base (OMSB)

Client’s Representative Andrew Natta 5.2 Milestones

Task Name Start Finish Design and Construction of OMSB Mon 4/07/16 Mon 18/09/17 LOI Award Mon 4/07/16 Mon 4/07/16 Contract Negotiations Mon 4/07/16 Mon 14/11/16 Contract Award Wed 16/11/16 Wed 16/11/16 Preliminaries Mon 4/07/16 Fri 9/09/16 Design Mon 4/07/16 Fri 18/11/16 Procurement Wed 16/11/16 Wed 5/04/17 Mobilisation Wed 26/10/16 Fri 24/02/17 Execution Mon 5/12/16 Tue 22/08/17 Early Works Mon 5/12/16 Tue 14/02/17 Construction E - Dredging Mon 12/12/16 Fri 23/06/17 Construction A - Sheet Piling Fri 24/02/17 Mon 19/06/17 Construction B - Laydown Area Tue 20/06/17 Fri 21/07/17 Construction C - Crane Pads Fri 19/05/17 Thu 15/06/17 Construction D - LCT Ramp Wed 31/05/17 Fri 21/07/17 Construction F - Office Area Mon 24/07/17 Tue 8/08/17 Construction G - Miscellaneous Tue 20/06/17 Tue 22/08/17 Practical Completion Tue 22/08/17 Tue 22/08/17



10 of 32

5.3 Construction Program A Construction Program / Timeline has been prepared in Microsoft GANTT chart format. This program is a standalone document (MCE0455_PRM_001) and will be regularly updated during the course of the project. Each identified task has been defined in terms of duration and interdependencies, as well as the resources allocated to that task. Public holidays are included in the timeline as non-working days. Construction works will be performed on 21 days on 7 days off roster. Normal working times shall be Monday to Friday 7am – 7pm and Saturday & Sunday 7am – 6pm. All dredging and reclamation activities will be carried out on a full-continuous roster (24/7). 5.4 Site Lay-Out The overall site layout, to execute the works under this contract, will comprise of a Contractor’s site office and laydown area, a location for marine plant storm mooring and an on-water activity zone demarcating the areas that the floating plant will be operating, as detailed in the following sections. In accordance with the approval DEIA Section 7.7 (BMT Oceanica & BMT JFA 2014), Maritime Constructions’ will erect information signage at the local Onslow boat ramp facility for public awareness and information, detailing the site layout, description of dredging operations, timeframe for the works, and on-water users’ obligations with regards to the Marine Activity Zone. 5.5 Marine Activity Zone The proposed on-water activity zone shown in Figure 2 below outlines the footprint of the on-water construction. Details of this proposed activity zone will be provided to Marine Safety, the Pilbara Port Authority and Maritime Constructions will issue a Notice to Mariners advising other Port users of works that may affect the safe navigation of vessels. Maritime Constructions will request Marine Safety to implement temporary vessel speed restrictions of 5 knots around this activity zone for the duration of these works for the safety of both construction crew and the general public. The purpose of the Marine Activity Zone (MAZ) will allow free and safe movement of construction floating plant during the course of the works. The MAZ is slightly larger than the dredging area footprint to allow for anchor positioning outside of the dredging area when dredging close to the boundaries of the footprint. The exclusion zone provides the pubic and all port users a clearly defined area to avoid, reducing navigational risks during the term of this project. However the MAZ will not be entirely occupied by floating plant during the works and only when navigational hazards such as anchors need to be located when operating close to the channel. This marine activity zone will be occupied by floating plant for a period of approximately 6-8 weeks, comprising of dredging activities performed by a cutter suction dredge, as well as during setup and demobilisation activities. An agreed VHF radio channel will be reserved for on-water marine works communication, based on standard marine communication protocols and alerts in case of emergencies. The station will serve as the means of communication between vessels. Other facility users, such as commercial and charter boat operators will also be provided with this VHF channel for communication with Maritime Constructions’ dredge operator and project supervisor should the need arise. The position of the cutter suction dredge will be controlled by anchors placed on the seafloor, comprising of a single stern anchor and 2 forward anchors. The planned position of all floating plant



11 of 32

and anchors will be reported to the Harbour Master each day. Anchors will be clearly marked by ‘Special Marker’ buoys. The cutter suction dredge will be operated and crewed 24 hours per day 7 days per week.

Figure 2 : Marine Activity Zone

5.6 Land Operations The land-based Contractor Activity Zone will be established on land, covering the entire site included in the works. The site is shown in Figure 3 below.

Figure 3 : Land activity zone

5.7 Dredge Methodology For specific details of the dredging methodology, reference is made to the latest revision of document MCE0455_PMP_011 – Dredging & Reclamation Management Plan.



12 of 32

6 Water Quality 6.1 Existing Environment Beadon Creek is a tidal inlet approximately 2.5 km east of the town of Onslow on the north-west coast of Western Australia. Beadon Creek is used as a harbour for both recreational and commercial activities. Commercial operators including fishing vessels, charter vessels, tugs, barges and oil and gas industry supply vessels operate within the area. The Beadon Creek has high natural turbidity levels in both nearshore and offshore waters throughout the region. A review of studies for the Chevron Wheatstone Project indicated median turbidity levels during non-cyclonic periods ranging between <1 up to 6 NTU. Periodically higher levels of turbidity were observed at Beadon Creek as a result of outflow from the Ashburton River following high rainfall periods. During cyclone events the turbidity in the nearshore waters can increase by more than 10 times. These high turbidity events in the nearshore waters are considered natural phenomena and species within the local marine environment are able to tolerate these conditions for short periods. During a previous maintenance dredging campaign at Beadon Creek (2012), measurements of return water and ambient water acidity were obtained, which did not pose any issues relating to return water acidity. Tributyltin (TBT) has been discovered in existing sediments at levels of environmental concern at 4 boreholes within the area to-be dredged as part of the works (BMT Oceanica & BMT JFA 2014; and BMT Oceanica 2016). 6.2 Potential Negative Impacts on Marine Environment Sediment data from the Beadon Creek capital dredge area indicate that the relevant metals encountered met NAGD Screening levels (CA 2009), EILs and relevant HILs (DEC 2010). Guidelines for ASS were also met (DEC 2009).

However, total TBT in sediments exceeded the NAGD guideline in surface sediments at some sites, while elutriate TBT exceeded the 90% species protection guideline in surface sediments at sites B7 and B9. Reference is hereby made to Annex 8.1: Beadon Creek Capital Dredge Area and Sediment Sample Sites. Further testing in October 2016, has narrowed the area and volumes of contamination



13 of 32

expected in the Beadon Creek dredging footprint, and are detailed in

Figure 4 below. Due to the various characteristics of the riverbed sediments and the method used to excavate (dredge) these, several potential negative impacts on the marine environment may occur. These include:

1. Release of TBT’s into the water column; 2. Increase of turbidity / reduced water clarity;



14 of 32

Figure 4 : Redefined area of TBT contamination in Beadon Creek Reference is made to the updated Memorandum to the OPEA on 01/11/2016 that details the recommended management of TBT risk material in Beadon Creek, and the document MCE0455_PMP_011 Dredging & Reclamation Management Plan, which details the methodology for dredging and spoil management, in line with the requirements of the OPEA and recommendations from BMT Oceanica. 6.2.1 Release of TBT’s

Given the location of works, a small section of the dredge location is likely to contain TBT’s which can be released within the sediments (i.e. turbidity). Dredging and reclamation of these materials will be treated differently to the bulk of the dredging work and managed by two main methods;

1. Area B, C, D - Dredging material to the same outfall location as clean material, but with low sediment concentration in the dredge slurry, to dilute the effect of TBTs on the return water. The required sediment concentration in the dredge slurry, for each of the areas is listed below;

i. Area B to be dredged at 5% or less (sediments in dredge slurry)

ii. Area C to be dredged at 10% or less (sediments in dredge slurry)

iii. Area D to be dredged at 16% or less (sediments in dredge slurry)

2. Area A - Dredging material to a separate non-return water spill pond, where water will be contained and tested before being approved for release to the natural environment.



15 of 32

6.2.2 Water Clarity / Turbidity

Fines released in the process of dredging and discharging can reduce the visibility of the water, which may have a negative impact on the benthic flora and fauna which grow and live in the vicinity of the dredge site. Dredging of the area can create a moderate plume in the immediate vicinity of the CSD. However, given the location of the works and the history of Beadon Creek, upper sediments within a small section of the creek may contain TBT, which could be transported with the plume from the works. 6.3 Water Quality Criteria The Australian national Water Quality management Strategy (NWQMS), 2000 aims to achieve the sustainable use of Australia’s and New Zealand’s water resources by protecting and enhancing their quality while maintaining economic and social development. Due to the nature of dredging, the relevant criteria in the Strategy cannot always be achieved at the dredge or near the disposal site. The criteria does however apply to the quality of water at locations further afield and to post dredging for all sites, as there must be a return to the background (pre-dredging) conditions. The following criteria for water quality will be applicable for this project;

No leaking or seepage observed in the reclamation or TBT containment bunds or dredge pipeline

Supernatant water TBT concentration meets the ANZECC & ARMCANZ (2000) 99% species protection level

Plume water TBT concentration meets the ANZECC & ARMCANZ (2000) 99% species protection level

HEPA water TBT concentration meets the ANZECC & ARMCANZ (2000) 99% species protection level

Oyster flesh TBT concentration is no greater than baseline

The monitoring requirements for the project are shown in Figure 5 below (as per BMT Oceanica & BMT JFA, 2014)



16 of 32

Figure 5: Water Quality Monitoring Requirement Outline Table



17 of 32

7 Water Quality Management

7.1 Monitoring Program The water quality monitoring program for the dredging operations will comprise the following:

1. Pre-works, to determine background conditions (by others) 2. During dredging and reclamation, 3. Post work (if triggered), to determine the final local water quality and whether there has

been a return to background conditions (by others) This document focuses on the requirements of, and program to be performed by Maritime Constructions (the contractor). Parameters to be monitored are:

Plume sketch (at cutter head site and outflow location from swale to creek) Site photograph Bund and pipeline inspections Water sample, labelled and packed into a cooler for transport GPS locations of sample points

Measurements will be taken from locations identified in section 7.2 below. All measurements will be carried out in accordance with accepted industry standard procedures. Records will be maintained using a standard Report Sheet (Annex [8.5]). 7.2 Monitoring Sites For this project, water quality monitoring will be carried out at a total of 4 sites, the locations of which are detailed in Annex [8.1]): Monitoring sites are divided into four types;

1. Bund walls at outfall swale/pond and TBT containment site

2. Supernatant water (water within bunded area – as close as possible to the outflow to the creek) and within the TBT containment site

3. Discharge Plume (water downstream of the outflow of the creek) – defined by the representation sketch in Annex 8.3

4. Fixed monitoring sites, as defined by Annex 8.3



18 of 32

7.3 Water Quality Monitoring Procedure The following Water Quality Monitoring procedure will be carried out by an employee of MC, the monitor, and generally the following steps and processes will be followed:

Monitoring should occur during between the hours of 1100 and 1300 when sun glint on the water is minimal

All external circumstances that might affect the results of the monitoring will be recorded (boat/ship movements, stormwater discharges etc);

The person taking the measurements/samples will sign the records; The procedure for each specific sample / recording type are detailed further in the sections below 7.3.1 Plume Sketches

Using the provided template, sketch daily during dredging between 1100 and 1300 when sun glint on the water surface is minimal:

Of the turbid plume at the dredging site Of the return water discharge plume Daily during dredging between 1100 and 1300 when sun glint on the water surface is minimal On a pre-designed template (Annex 8.5), including the completion of information fields.

Once the sketch is complete, the monitor shall check off this monitoring action on the checklist provided (Annex 8.4). The completed plume sketches and checklist will be provided to DoT at the end of each week of the dredging works. As a backup, the environmental monitoring checklist and plume sketches shall be photographed at the end of each day.

7.3.2 Site Photographs

Take photographs of the dredging plume, reclamation site (including overflow water discharge plume) and TBT containment site:

daily during dredging between 1100 and 1300 when sun glint on the water surface is minimal from the same position each day (where possible) in a direction that will minimise sun glint from the water surface Using a digital camera with a resolution of at least 6 megapixels and set to automatically stamp the

images with the date and time. Wherever possible, the same camera will be used for the duration of the dredging to ensure all photographs are of the same quality.

Once complete the monitor shall check off this monitoring commitment on the checklists provided (Annex 8.4). The photographs and checklist will be provided to DoT at the end of each week throughout the dredging works. As a backup, the environmental monitoring checklist shall be photographed at the end of each day.

7.3.3 Bund and Pipeline Inspection

The monitor will visually inspect the bunds at the reclamation site and the TBT containment site, and dredge pipeline daily during dredging for signs of leaks and seepage as outlined in the DEIA. These inspections shall be completed by personnel physically walking around the perimeter of the bund conducting visual inspections for the following indicators of leakage/seepage (additional indicators may also be included as necessary):

water visibly leaking/piping on the outside of the bund wall (for sections of the bund above water line) or pipeline

wet or damp areas on the outside of the bund or around the pipeline on land



19 of 32

evidence of scouring on the outside of the bund abnormal flows visible in the surrounding water (e.g. subsurface upwelling) abnormal turbid water flows adjacent to the bund walls or pipeline in the water.

DoT shall be notified immediately should any signs of leaks and seepage in the bunds or pipeline be observed. Once complete the monitor shall check off this monitoring commitment on the checklists provided (Annex 8.4). As a backup, the environmental monitoring checklist shall be photographed at the end of each day. Photographs of the bund inspection may also be taken and provided to DoT the end of each week of the dredging works. 7.3.4 Water Samples

7.3.4.1 Supernatant Water Sampling The monitor will collect overflow water samples from the reclamation site close to the outflow to the creek and from the TBT containment site. Sampling at the TBT containment site shall commence as soon as TBT Area A (defined in BMT Oceanica 2016) has been dredged. Instructions for water sampling are as follows:

collect two samples within the reclamation site as close as possible to the outflow to the creek OR when TBT Area A has been dredged, one sample within the reclamation site and one sample within the TBT containment site

record the GPS coordinates of the sampling location(s) on the environmental monitoring checklist (Section 8.4)

prior to collecting each sample, rinse each 1 L polypropylene bottle and cap with the supernatant water 3 times

at arm's length into the water, fill each bottle with supernatant water leaving a ~5 cm gap at the top and secure the bottle cap tightly

label each bottle with date and sample name/number (Supernatant 1 and Supernatant 2 OR Reclamation supernatant and TBT supernatant)

place bottles in esky with frozen ice bricks (preferably with the ice bricks on the bottom to maximise sample cooling) ready for freight or store frozen and in the dark if immediate freighting not planned. Appropriate storage is vital for sample preservation. Note, ice blocks must be frozen prior to sampling

check off this monitoring commitment on the checklist (Section 8.4). The checklist is to be provided to DoT at the end of each week of the dredging works.

7.3.4.2 Discharge Plume The monitor will collect water samples from the discharge plume immediately after completion of the plume sketch (refer to Section 7.3.1) such that the plume trajectory has been determined. Within the discharge plume, there will be four sampling sites (Figure 6 : Representation of Discharge Plume Sampling Points):

Plume 1: at the outflow to the creek Plume 2: in the discharge plume 50 m downstream of the outflow point Plume 3: in the discharge plume 100 m downstream of the outflow point Plume 4: in the discharge plume 200 m downstream of the outflow point.



20 of 32

Figure 6 : Representation of Discharge Plume Sampling Points

collect a single sample at each of the four plume sampling sites (Figure 6) record the GPS coordinates of the sites on the environmental monitoring checklist (Section 8.4) prior to collecting each sample rinse each 1 L polypropylene bottle and cap with creek water

3 times at arm's length into the water, fill each bottle with creek water leaving a ~5 cm gap at the top and

secure the bottle cap tightly label bottle each date and sample name/number (Plume 1 (closest to discharge point), Plume 2

etc) place bottles in esky with frozen ice bricks (preferably with the ice bricks on the bottom to

maximise sample cooling) ready for freight or store frozen and in the dark if immediate freighting not planned. Appropriate storage is vital for sample preservation. Note, ice blocks must be frozen prior to sampling

check off this monitoring commitment on the checklist (Annex 8.4), to be provided to DoT at the end of each week of the dredging works

7.3.4.3 Fixed Sites The monitor will collect water samples from the fixed High Ecological Protection Area (HEPA) sites (Figure 7; Table 1). Table 1 - Fixed HEPA Site Coordinates

Site Easting Northing Longitude (DMS) Latitude (DMS) Longitude (DDM)

Latitude (DDM)

HEPA1 306770 7605926 115° 7' 58.51" E 21° 38' 21.77" S 115° 7.975' E 21° 38.363' S

HEPA2 306699 7604366 115° 7' 55.39" E 21° 39' 12.48" S 115° 7.923' E 21° 39.208' S

Instructions for water sampling are as follows:

collect a single sample at each of the HEPA sampling sites (Table 1)



21 of 32

record the GPS coordinates of the sites on the environmental monitoring checklist ( Annex 8.4) prior to collecting each sample rinse each 1 L polypropylene bottle and cap with creek water

3 times at arm's length into the water, fill each bottle with creek water leaving a ~5 cm gap at top and

secure the bottle cap tightly label bottle with date and sample name/number (HEPA 1 or HEPA 2) place bottles in esky with frozen ice bricks (preferably with the ice bricks on the bottom to

maximise sample cooling) ready for freight or store frozen and in the dark if immediate freighting not planned. Appropriate storage is vital for sample preservation. Note, ice blocks must be frozen prior to sampling

check off this monitoring commitment on the checklist (Annex 8.4), to be provided to DoT at the end of each week of the dredging works

Should an exceedance of TBT relative to guideline levels1 occur at either HEPA site, MC will be notified via OMSB by DoT, dredging works shall immediately cease and MC shall collect samples daily from both the fixed HEPA and Moderate Ecological Protection Area (MEPA) sites until notified otherwise (Annex8.2, Table 1, Table 2). Table 2 Fixed MEPA Site Coordinates

Site Easting Northing Longitude (DMS) Latitude (DMS) Longitude

(DDM) Latitude (DDM)

MEPA1 306669 7605622 115° 7' 54.88" E 21° 38' 31.64" S 115° 7.915' E 21° 38.527' S

MEPA2 306675 7605363 115° 7' 54.98" E 21° 38' 40.05" S 115° 7.916' E 21° 38.668' S

MEPA3 306638 7605252 115° 7' 53.66" E 21° 38' 43.63" S 115° 7.894' E 21° 38.727' S

MEPA4 306718 7604985 115° 7' 56.32" E 21° 38' 52.34" S 115° 7.939' E 21° 38.872' S

Figure 7 : Fixed monitoring site map



22 of 32

7.3.4.4 Water Sample Frequency The monitor will collect water samples daily for the first two weeks of dredging. Sampling frequency shall then reduce to three times per week for one week and then once per week thereafter should no exceedances of guideline levels be observed. Sampling for the supernatant water within the TBT containment site shall be daily until notified by DoT or the water has evaporated/seeped into the ground. If there are exceedances, OMSB shall be notified of the consequent sampling regime. The proposed sampling and freighting timetable (Table 3is based on the sampling frequency if no exceedances are observed and will be updated once dredging start date and Christmas shutdown period is confirmed.

7.3.4.5 Water Sample Freight Once all samples have been taken, freight or store samples as per the freighting schedule below;

pack eskies with sample bottles and ice blocks (~ 4 ice blocks per esky; at the bottom of each esky) and ensure there is minimal risk of breakages by filling gaps with bubble wrap or packing material. Note, ice blocks must be frozen prior to sampling

include a signed document listing the samples in the freight and noting the sample condition (chilled or frozen) to be used as a chain of custody

tape eskies shut with the tape going all the way around the bottom of the eskies to prevent the lids popping off in transit

address eskies to: Katharine Thorne BMT Oceanica 1/353 Cambridge Street Wembley WA 6014

for the first 2 days and last 3 weeks of dredging, samples will not be frozen and must be sent the same day as collection on overnight freight (Toll Ipec – 0427 689094)

remaining samples will be frozen (or chilled if collected on the day of freighting) and sent on Wednesdays and Sundays via refrigerated freight (McMahon Burnett – 0427 714227)

samples not freighted immediately must be stored in the dark and frozen overnight/refrigerated freight is essential to ensure samples remain viable for testing once freighted notify Katharine Thorne and Adelaide Bevilaqua via email or phone:

o [email protected] o [email protected] o 08 6272 0000

overnight freight must only be completed Monday–Thursday to ensure they arrive in Perth on a business day

see Annex 8.6for proposed freighting timetable should no exceedances of TBT relative to guideline levels1 be observed; this will be updated once dredging start date and Christmas shutdown period is confirmed.

mailto:[email protected]



23 of 32

7.4 Sample Regime The works require a full set of samples and recordings in a single day. The frequency of sampling varies during the life of the project, and is detailed in Table 3. The relevant contingency plans (Annex 8.2) must be applied if the criteria in Section 6.3 are exceeded (DoT will notify if exceedances are recorded)

Table 3 : Sampling Day Frequency

Dredging / Sampling Week Sample Frequency

Week 1 Daily

Week 2 Daily Week 3 3 per week Week 4 1 per Week

Week 5 + 1 per week

If sample returns an exceedance Per direction of DoT The following Table 4details which parameters are to be monitored and recorded at which sites on each sampling day per the above frequency table:

Table 4 : Sample and Recording site requirements Sample Location Plume

Sketch Site

Photo Inspection GPS

Location Water

sample Dredge site / Cutter-head Y Y

Dredge Pipeline Y

Reclaim Bund Walls Y

Reclaim Area Y

TBT Containment Area Y

Supernatant 1 Y Y

Supernatant 2 Y Y

Plume 1

Y Y

Y Y

Plume 2 Y Y

Plume 3 Y Y

Plume 4 Y Y

HEPA 1 Y Y

HEPA 2 Y Y

MEPA 1* Y Y

MEPA 2* Y Y

MEPA 3* Y Y

MEPA 4* Y Y * MPEA sites to be monitored only if and after a HPEA site returns an exceedance value. The DoT will notify MC if exceedances occur. Should works be delayed or suspended, testing should continue until further notice, and agreement by, the DoT.



24 of 32

7.5 Records All records will be maintained on the standard form ‘Environmental Monitoring Checklist’ (Annex 8.4) and will include all information identified in Section 7.3 above. Records of the plume extent will be sketched on the standard format shown in Annex 8.5 All photographs shall be date stamped. The person taking measurements/samples, as well as the Site Supervisor, will sign the records each day. Records will include any external circumstances that may have affected the monitoring results, such as boat movements. All records will be submitted each week to the Project Management team, for checking against this WQMP to identify any non-conformances that should be addressed. Results will be provided to the DoT at the completion of each week. 7.6 Reporting Monitors are to maintain records on the standard recording sheet in Annex 8.4. Records / Reports will be formalised by the Project Manager or Project Engineer and forwarded to the DoT at the completion of each week of dredging. At the close of the works, the Project Manager will collate all of the results of the monitoring of the works, the data of which will be submitted to the Department of Transport for coordination and consultation with the OEPA, if required.



25 of 32

8 Annexure

8.1 Beadon Creek Capital Dredge Area and Sediment Sampling Sites To characterise the dredged material a number of randomly-distributed sites were selected for sampling. Sample cores were collected from 15 sites on 4 and 5 December 2012 and the target core depths varied between 0.7m and 3.1m. The majority of recovered core lengths were less than the targets due to core refusal. Each sediment core was divided into 0.5 m depth intervals and samples were taken at each interval. As the likelihood of contamination of the proposed dredged sediments was low, the following risk-based screening approach was used to select the samples for analysis:

The surface sample from each core was analysed. These were considered to have the highest risk of contamination;

All samples from the Site B11 were analysed to determine the contaminant status of the deeper sediments. Site B11 is located adjacent to the existing wharf and was considered as having the highest risk of contamination, in addition, this site is located in a shallow area where the proposed dredging will remove a relatively large volume of sediment;

All samples from Sites B15 and B14 were also analysed due to their proximity to the storm water drain;

All the remaining samples were stored frozen for further analysis, if required.



26 of 32

8.2 Contingency Chart In all instances, follow the advice and direction of DoT for recorded environmental exceedances in relation to this Water Quality Monitoring Plan.



27 of 32

8.3 Overview of Work Areas and Monitoring Sites All monitoring sites will be subject to the ability to safely access the area in work boats, monitoring results will be taken as near as practical to the indicated sites and all changes to these activities will be accurately recorded on the WQM record sheets, with reasons for changes, including but not limited to rough weather, tidal movement, water depth, and safe access for work crews.

Site Easting Northing Longitude (DMS) Latitude (DMS) Longitude (DDM)

Latitude (DDM)

HEPA1 306770 7605926 115° 7' 58.51" E 21° 38' 21.77" S 115° 7.975' E 21° 38.363' S

HEPA2 306699 7604366 115° 7' 55.39" E 21° 39' 12.48" S 115° 7.923' E 21° 39.208' S

Site Easting Northing Longitude (DMS) Latitude (DMS) Longitude

(DDM) Latitude (DDM)

MEPA1 306669 7605622 115° 7' 54.88" E 21° 38' 31.64" S 115° 7.915' E 21° 38.527' S

MEPA2 306675 7605363 115° 7' 54.98" E 21° 38' 40.05" S 115° 7.916' E 21° 38.668' S

MEPA3 306638 7605252 115° 7' 53.66" E 21° 38' 43.63" S 115° 7.894' E 21° 38.727' S

MEPA4 306718 7604985 115° 7' 56.32" E 21° 38' 52.34" S 115° 7.939' E 21° 38.872' S



28 of 32



29 of 32

8.4 Standard WQM Record Sheet



30 of 32

8.5 Plume Sketch



31 of 32

8.6 Example Sampling Regime Table

Day Dredging day No. samples collected

Sample condition Freight Freight method

No. samples in freight

Friday, 16 December 2016 1 8 Frozen No – –

Saturday, 17 December 2016 2 8 Frozen No – –

Sunday, 18 December 2016 3 8 Chilled Yes Refrigerated – McMahon

Burnett 24

Monday, 19 December 2016 4 8 Frozen No – –

Tuesday, 20 December 2016 5 8 Frozen No – –

Wednesday, 21 December 2016 6 8 Chilled Yes Refrigerated – McMahon

Burnett 24

Thursday, 22 December 2016 7 8 Frozen

No – store samples over break

– –

Friday, 23 December 2016 No Dredging – – No – –

Saturday, 24 December 2016 No Dredging – – No – –

Sunday, 25 December 2016 No Dredging – – No – –

Monday, 26 December 2016 No Dredging – – No – –

Tuesday, 27 December 2016 No Dredging – – No – –

Wednesday, 28 December 2016 No Dredging – – No – –

Thursday, 29 December 2016 8 8 Frozen No – –

Friday, 30 December 2016 9 8 Frozen No – –

Saturday, 31 December 2016 10 8 Frozen No – –

Sunday, 1 January 2017 11 8 Frozen No – –

Monday, 2 January 2017 12 8 Frozen No – –

Tuesday, 3 January 2017 13 8 Frozen No – –

Wednesday, 4 January 2017 14 8 Chilled Yes Refrigerated – McMahon

Burnett 64

Thursday, 5 January 2017 15 8 Frozen No – –

Friday, 6 January 2017 16 – – No – –

Saturday, 7 January 2017 17 8 Frozen No – –

Sunday, 8 January 2017 18 – – No – –

Monday, 9 January 2017 19 8 Frozen No – –

Tuesday, 10 January 2017 20 – – No

Wednesday, 11 January 2017 21 – – Yes Refrigerated – McMahon

Burnett 24

Thursday, 12 January 2017 22 8 Chilled Yes Overnight – Toll Ipec 8




32 of 32

Saturday, 14 January 2017 24 – – No – –


Monday, 16 January 2017 26 – – No – –

Tuesday, 17 January 2017 27 – – No – –

Wednesday, 18 January 2017 28 – – No – –






Tuesday, 24 January 2017 34 – – No – –

Wednesday, 25 January 2017 35 – – No – –






Water Quality Monitoring Plan (WQMP)...A 24.08.2016 Issued For Review S Watkins S Krol I Lambay B...

Documents

Transcript of Water Quality Monitoring Plan (WQMP)...A 24.08.2016 Issued For Review S Watkins S Krol I Lambay B...