csmw soil and water management plan

[SMCSWCSM-LOR-SMC-EM-PLN-000002] [October 2020]

© Laing O’Rourke 2018, all rights reserved

Central Station Main Works Project Construction Soil and Water Management Plan

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Sydney Metro City and Southwest Central Station Main Works Project Construction Soil and Water Management Plan




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Sydney Metro City and Southwest, Central Station Main Works Project Construction Soil and Water Management Plan

Document

Title Construction Soil and Water Management Plan

Client CSMW

Laing O’Rourke contract no. K51

Revisions

Revision Date Description Prepared by Approved by

1 27/03/2018 Draft for Review DC CM

2 13/04/2018 Draft for Agency, ER and SM review DC CM

3 09/06/2018 Review following SM & ER comments DC CM

4 18/06/2018 Review following SM & ER comments CD CM

5 18/07/18 Updated following DPIE review CD CM

6 15/02/19 6 monthly review LD CM

7 15/02/19 Review LD CM

8 19/08/2020

19/10/2020

Review HN CM




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Table of Contents

List of Tables ................................................................................................................................... 4

List of Figures .................................................................................................................................. 4

Introduction .......................................................................................................................... 7

1.1 Purpose ................................................................................................................................. 7

1.2 Background .......................................................................................................................... 7

1.3 Planning Approval ............................................................................................................... 7

1.4 Overview of the Central Station Main Works (CSMW) .................................................... 8

1.5 CSMW Scope of Works ....................................................................................................... 8

1.5.1 Permanent Works ................................................................................................................ 8

1.5.2 Ancillary works .................................................................................................................... 9

1.5.3 Combined Services Route CSM ......................................................................................10

1.5.4 Construction Hours ...........................................................................................................10

1.6 Works Location and Site Layout .....................................................................................11

1.7 Objectives and Targets .....................................................................................................11

Legal and Other Requirements ........................................................................................12

2.1 Planning requirements......................................................................................................13

2.2 Guidelines ...........................................................................................................................14

2.3 ISCA 14

2.3.1 Dis-1 Receiving Water Quality .........................................................................................14

2.3.2 Lan-2 Conservation of on-site resources .......................................................................14

2.3.3 Lan-3 Contamination and Remediation ..........................................................................14

2.3.4 Wat-1 Water Use Monitoring and Reduction ..................................................................15

2.3.5 Wat-2 Water Saving Opportunities ..................................................................................15

2.4 LORAC Severe Environmental Risks ..............................................................................15

2.5 Issue, Revision and Re-issue ...........................................................................................15

Roles and Responsibilities ...............................................................................................16

Existing Environment ........................................................................................................16

4.1 Existing Soil Landscape ...................................................................................................16

4.2 Deep Creek .........................................................................................................................17

4.3 Blacktown ...........................................................................................................................17

4.4 Geology ...............................................................................................................................17

4.5 Salinity ................................................................................................................................17

4.6 Acid Sulphate Soils ...........................................................................................................17

4.7 Contamination ....................................................................................................................17

4.8 Gasworks Related Contamination ...................................................................................18

4.9 Site Surface Water .............................................................................................................18

4.10 Receiving Water Quality ...................................................................................................19

4.11 Flooding ..............................................................................................................................20

Aspects and Potential Impacts ........................................................................................21

Soil and Water Management ............................................................................................25




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6.1 Erosion and Sediment Control ........................................................................................25

6.1.1 General Principles .............................................................................................................25

6.1.2 Resources...........................................................................................................................26

6.1.3 Sediment Basins ................................................................................................................26

6.1.4 Erosion and Sediment Control Plans ..............................................................................26

6.2 Surface Water Management .............................................................................................28

6.2.1 Water Treatment Plant ......................................................................................................28

6.2.2 Environmental Protection Licence 21148 .......................................................................29

6.2.3 NSW Water Quality Objectives ........................................................................................31

6.2.4 Minimise Water Demand and Waste Water Production ................................................32

6.2.5 Reuse ..................................................................................................................................33

6.2.6 Onsite Discharge ...............................................................................................................33

6.2.7 Offsite Discharge ...............................................................................................................33

6.3 Water Efficiency .................................................................................................................33

6.4 Refuelling, Chemicals and Spill Management ...............................................................34

6.5 Contamination ....................................................................................................................35

6.5.1 Remedial Action Plans ......................................................................................................35

6.5.2 Asbestos Removal ............................................................................................................36

6.5.3 Management of Hazardous Materials During Demolition .............................................36

6.6 Salinity ................................................................................................................................37

6.7 Acid Sulphate Soils Contingency Plan ...........................................................................37

6.8 Unexpected Finds Procedure ..........................................................................................37

Water Quality Monitoring ..................................................................................................39

Training ...............................................................................................................................39

Monitoring, Auditing and Reporting................................................................................40

Review and Improvement .................................................................................................41

Enquiries, Complaints and Incident Management ........................................................41

Agency consultation .........................................................................................................42

Appendix A Construction Soil and Water Management Compliance Matrix.........................43

Appendix B – Government Stakeholder Correspondence ......................................................61

Appendix C – Unexpected Finds Procedure .............................................................................63

Appendix D – SER’s addressed in this Management Plan ......................................................65

List of Tables

Table 1: Legislation and Planning Instruments ............................................................................................... 122

Table 2: Roles and Responsibilities ................................................................................................................ 126

Table 3: Aspects and Potential Impacts ............................................................................................................. 21

Table 4: EPL requirements for Water Treatment Plant discharge ............................................................... 1629

List of Figures

Figure 1.1 CSM Site ............................................................................................................................................. 9




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Figure 1.2 – CSR around Central Station. ......................................................................................................... 10

Figure 1.3 – CSMW Site. .................................................................................................................................... 11

Figure 4.1 – Licenced discharge locations as per EPL 21148. ........................................................................ 19

Figure 6.1 – Licenced discharge locations as per EPL 21148 ......................................................................... 31

Figure 6.2 – WTP discharge in trunk stormwater system. ................................................................................ 32




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Terms and definitions

The following terms, abbreviations and definitions are used in this plan.

Terms Explanation

ACM Asbestos Containing Materials

AHD Australian Heritage Datum

ARI Average Rainfall Intensity

AS Australian Standard

Assurance Application Laing O’Rourke’s Online Tool to manage Non-Conformances

CAR Corrective Action Request

CEMP Construction Environmental Management Plan

CoA Conditions of Approval

CPESC Certified Practitioner in Erosion and Sediment Control

CSSI Critical State Significance Infrastructure

CSMW Central Station Main Works Contract Package

CSWMP Construction Soil and Water Management Plan

DPIE Department of Planning Industry & Environment

ECM Environmental Control Map

EIS Environmental Impact Statement (Sydney Metro City and Southwest Chatswood to Sydenham dated 3 May 2016 submitted to the Secretary seeking approval to carry out the CSSI and as revised as required by the Secretary under the EP&A Act)

EPL Environment Protection Licence

ER Environmental Representative

ERSED Control Erosion and Sediment Control

ISO International Standardization Organisation

Laing O’Rourke Laing O’Rourke Australia Construction Pty Limited

Minister NSW Minister for Planning

OEH Office of Environment and Heritage

PEM Project Environmental Manager

RAP Remedial Action Plan

RTS Response to Submissions

SDS Safety Data Sheet

SMCSW Sydney Metro City and Southwest

SWMS Safe Works Method Statement

TfNSW Transport for New South Wales

WTP Water Treatment Plant




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Introduction

1.1 Purpose

This Construction Soil and Water Management Plan (CSWMP) outlines the Central Station Main Works (CSMW) Project’s (the Project) approach to implementing measures to mitigate the risk of impact to soil and water in accordance with the Laing O’Rourke Construction Pty Limited’s (Laing O’Rourke) legal, planning and contractual requirements. This CSWMP has been developed in compliance with Sydney Metro’s requirements, Laing O’Rourke’s environmental management system and the Minister’s Conditions of Approval (CoA). The Plan incorporates the requirements of the Construction Environmental Management Framework.

1.2 Background

Sydney Metro City & Southwest – Chatswood to Sydenham Project is a new 30km metro line extending metro rail from the end of Sydney Metro Northwest at Chatswood under Sydney Harbour, through new CBD stations and southwest to Bankstown. It is due to open in 2024 with the capacity to run a metro train every two minutes each way through the centre of Sydney. The Project forms part of the Sydney Metro City & Southwest – Chatswood to Sydenham Project and includes the construction of new underground platforms at Central Station and new related pedestrian access ways. The Project consists of the Metro Station Works, the Central Station Works and the Central Walk Works which are described in the sections below.

1.3 Planning Approval

The Project has been assessed by the Department of Planning Industry and Environment under Section 115ZB of the Environmental Planning and Assessment Act 1979 (EP&A Act) as Critical State Significant Infrastructure (CSSI). The Project, its impacts, consultation and mitigation were documented in the following suite of documents:

• Critical State Significant Infrastructure Application SSI 15_7400;

• Sydney Metro – Chatswood to Sydenham –Environmental Impact Statement (Jacobs/Aracadis/RPS, 2016);

• Sydney Metro – Chatswood to Sydenham –Response to Submissions and Preferred Infrastructure Report (Jacobs/Aracadis/RPS 2016); and

The Planning Assessment Commission granted Approval for the Project on 9 January 2017 and the Laing O’Rourke scope of works is subject to the Minister’s Conditions of Approval.

Following approval of the Sydney Metro City and Southwest – Chatswood to Sydenham Project, a modification (SSI Mod 2: Central Walk) was assessed by the Department of Planning Industry and Environment and subsequently approved on 21 December 2017 under section 115ZI of the EP&A Act.

The consolidated Conditions of Approval’s for the Sydney Metro City and Southwest have been defined from the following approval modification documents.

• CSSI 7400 MOD 1 – Victoria Cross and Artarmon Substation (determined 18 October 2017)

• CSSI 7400 MOD 4 – Sydenham Station and Metro Facility South (determined 13 December 2017)

• CSSI 7400 MOD 2 – Central Walk (determined 21 December 2017)




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• CSSI 7400 MOD 3 – Martin Place Metro Station (determined 22 March 2018).

• CSSI 7400 MOD 5 - Blues Point Acoustic Shed (determined 2 November 2018).

• CSSI 7400 MOD 6 - Administrative Changes- Modification to Sydney Metro City & Southwest - Chatswood to Sydenham (determined 21 February 2019)

• CSSI 7400 MOD 7 – Administrative Changes – Modification to Sydney Metro City & Southwest – Chatswood to Sydenham (determined 29 June 2020)

1.4 Overview of the Central Station Main Works (CSMW)

The Metro Station Works include the installation of new platforms that will be constructed using sophisticated excavation techniques to create a cavern with an island platform, beneath Central Station’s existing heavy-rail platforms 12, 13, 14 and 15.

The Central Station Works include new infrastructure and the adjustments to existing infrastructure at Central Station to construct, operate and maintain the Metro Station Works. The key features of the Central Station Works include:

• a new north-south concourse for Central Station which will link the new metro station with the existing northern entrance and north concourse, a new east concourse entitled ‘the Central Walk’, and the existing southern baggage tunnel; and

• adjustments to the existing Paid Intercity Concourse, Olympic Tunnel, north concourse and northern entrance to Central Station.

The Central Walk Works include the provision of other infrastructure to provide improved connectivity and other operational enhancements throughout Central Station. The key features of the Central Walk Works include:

• a new eastern entrance for Central Station at Chalmers Street level;

• a new eastern concourse for Central Station beneath existing platforms 16 to 23 (the ‘Central Walk’), which will link the new eastern entrance, the new north south concourse, existing platforms 16 to 23 and the existing Eastern Suburbs Railway (ESR) concourse; and

• provisions to enable the future construction (by others) of an extension of the Central Walk through a new west concourse and a new western entrance for Central Station.

1.5 CSMW Scope of Works

1.5.1 Permanent Works

The permanent new infrastructure to be constructed includes:

• Shortening of platforms 9 to 14 at the northern end, and a corresponding lengthening at the southern end;

• Demolition of platforms 13 to 15 and re-instatement of platforms 13 to 14 to accommodate the construction of the new metro station;

• Reinforcement of Platform 12 and demolition of exiting canopies of Platform 12;

• Minor existing canopy modifications for Platform 14 for lift risers

• Suburban platforms refreshing;

• Station excavation requiring the removal of approximately 230,000 cubic metres of spoil;

• Demolition of the ‘Bounce Hostel’




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• Excavation and construction of the new eastern entrance, the Central Walk and related station access arrangements to existing platforms. The Central Walk excavation volume is approximately 8,500m3 and the excavation of the escalator adits from each platform is approximately 2400m3.

• Excavation of an advanced tunnel and associated shafts, estimated spoil removal of 2,400 cubic meters

• Installation of four track slabs between the Metro Box and platform 22,under track 16, 17/18, 19/20, 21/22. Approximate total volume of excavation for the track slabs will be 1400m3.

• Excavation and removal of approximately 4,000m3 from the suburban island platforms and a further 750m3 below the platform walls via the advanced adit and a further 160m3 below Platform 23 to the ESR perimeter wall to allow for the canopy tubes

• Construction of a padmount substation in Sydney Yard and associated feeders to Lee Street Substation.

Refer to Figure 1.1 below for the locations of the works.

Figure 1.1 CSM Site

1.5.2 Ancillary works

Ancillary works include fencing, hoarding, maintenance access, utility works, drainage, noise barriers, road and transport network works and temporary site offices, laydown and work sites to support construction.




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1.5.3 Combined Services Route CSM

The CSR for Central Station will provide for Communications (Comms) services (voice, data and IT connectivity, requiring 6 to 8 cables) and High Voltage electrical (HV) services that will service the whole site, both existing and the new infrastructure installations that are being introduced as part of the Central Station Main Works. It will extend as a circular route around the site, utilising existing service infrastructure where this is available and providing new installations as required to complete the system.

The CSR was included in the Environmental Impact Statement that was approved under SSI 15_7400 as part of the concept design (refer EIS Chapter 7, Project Description – Construction, Part 7.10.9, p231) and has progressed through a detailed design process (see figure 1.2). The CSR will be delivered in two phases. Phase A occurs in areas, 2, 3 and 4 and is restricted to the Western Baggage Tunnel, Northern Baggage Tunnel and Platform 1. Phase B occurs in all other Areas and extends to the Darling Harbour Goods Line, Mortuary Tunnel, Sydney Yard, Water Mains tunnel, Prince Alfred Substation, Railway Institute driveway and Sydney Network Base.

Figure 1.2 CSR around Central Station.

1.5.4 Construction Hours

In accordance with Condition of Approval (CoA) – E36, and EPL Condition L4.1Construction, except as allowed by Conditions E47 and E48 (excluding cut and cover tunnelling), must only be undertaken during the following standard construction hours:

• 7:00am to 6:00pm Mondays to Fridays, inclusive;

• 8:00am to 1:00pm Saturdays; and

• at no time on Sundays or public holidays.

CoA E37 places further restriction on the hours that ‘high noise impact’ generating activities may occur. Conditions E44 and E45 and EPL condition L4.3 also allows construction outside of scheduled hours under a range of conditions such as emergency works, where a negotiated agreement has been reached with a substantial majority of sensitive receivers who are within the vicinity of and may be potentially affected by the particular construction, etc.




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Condition E47 requires an out of hours work protocol be developed and implemented for work outside of the above standard construction hours (refer also to Section 1.8.1 below). Condition E48 specifies and similarly noted in EPL Condition L4.4 that the following activities may occur 24 hours per day seven days a week, subject to Condition E47:

a) tunnelling and associated support activities (excluding cut and cover tunnelling); b) excavation within an acoustic enclosure; c) excavation at Central without an acoustic enclosure (excluding Central Walk works at 20‐

28 Chalmers Street, Surry Hills); d) station and tunnel fit out; and e) haulage and delivery of spoil and materials.

1.6 Works Location and Site Layout

The Project location and site layout is highlighted in Figure 1.3.

Figure 1.3 CSMW Site

1.7 Objectives and Targets

The objectives and targets of the CSWMP have been identified from the CEMF, EIS, general best practice activities, Sydney Metro Water Discharge & Reuse Procedure and are outlined below:

Objectives

• Prevent pollution of surface water through appropriate stormwater, erosion and sediment control;

• Maintain existing water quality of surrounding surface watercourses;

• Minimise adverse impacts on existing flooding characteristics;

• Minimise demand for, and use of potable water;




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• Maximise opportunities for water re-use from captured stormwater, wastewater and groundwater;

• Source construction water from non-potable sources, where feasible and reasonable;

• Reduce the potential for drawdown of surrounding groundwater resources;

• Prevent the pollution of groundwater through appropriate controls;

• Reduce the potential impacts of groundwater dependant ecosystems; and

• Construct the Project in accordance with the NSW Water Quality Objectives.

These objectives conform to Transport for NSW (TfNSW) objectives as described in the Construction Environmental Management Framework.

Targets/ Key Performance Indicators

• No pollution incidents resulting in environmental harm or regulatory action;

• No formal warnings or Penalty Infringement Notices arising from the works;

• No non-compliances with Section 120 of the Protection of the Environment Operations Act (i.e. no incidents of “pollution”); and

• Following inspections, no re-occurrence of significant issues/non-compliances.

Legal and Other Requirements

Table 1 below details the legislation and planning instruments considered during development of this Plan.

Table 1: Legislation and Planning Instruments

Legislation Description Relevance to this CSWMP

Environmental Planning and Assessment Act 1979

This Act establishes a system of environmental planning and assessment of development proposals for the State.

The approval conditions and obligations are incorporated into this CSWMP.

Contaminated Land Management Act 1997

This Act provides for a process to investigate and remediate land that has been contaminated and presents a significant risk of harm to human health. Section 60 of the Act is a “Duty to Report Contamination”. This duty applies to owners of land and persons who become aware their activities have contaminated the land.

This plan defines how Laing O’Rourke will manage works to comply with this Act

Protection of the Environment Operations Act 1997

This Act includes all the controls necessary to regulate pollution and reduce degradation of the environment, provides for licensing of scheduled development work, scheduled activities and for offences and prosecution under this Act.

This plan defines how Laing O’Rourke will manage works to comply with this Act. The works will be conducted in accordance with the requirements of the EPL 21148.

Condition L1.1:

Except as may be expressly provided in any other condition of this licence, the licensee must comply with section 120 of the Protection of the Environment Operations Act 1997.




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Legislation Description Relevance to this CSWMP

Water Management Act 2000

Water Management (General) Regulation 2004

This Act and Regulation provide for the protection, conservation and ecologically sustainable development of water sources of the State and in particular to protect, enhance and restore water sources and their associated ecosystems.

This Act will have low relevance to the Project.

Sydney Metro projects assessed under Part 5.1 of the Environmental Planning and Assessment Act 1979 (EP&A Act) are exempt from obtaining water use approval under section 89, a water management work approval under section 90 or an activity approval (other than an aquifer interference approval) under section 91.

Sydney Water Act 1994 This Act establishes the Sydney Water Corporation as a statutory State owned corporation. The functions of the Sydney Water Corporation is to supply and store water, provide sewerage services, provide stormwater drainage and dispose of waste water within its area of operations.

Coordination will be required with Sydney Water during the works for a Permit to discharge of treated groundwater to a Sydney Water stormwater drain or a permit to use approved metered standpipes on Sydney Water hydrants is required.

Waste Avoidance and Resource Recovery Act 2001

This Act repeals the Waste Minimisation and Management Act, 1995.The purpose of the Act is to encourage the most efficient use of resources and to reduce environmental harm in accordance with the principles of ecological sustainable development. The Act provides for the making of policies and strategies to achieve these ends. It is an offence under the Protection of the Environment Operations Act (1997) to wilfully or negligently dispose of waste

in a manner that harms or is likely to harm the environment.

The relevance of the Act to this project is to implement the strategies by adopting the hierarchy of avoidance; avoidance of unnecessary resource consumption; resource recovery (including reuse, reprocessing, recycling and energy recovery), disposal (as a last resort).

2.1 Planning requirements

The CSWMP addresses the following requirements:

• Sydney Metro City and Southwest - Chatswood to Sydenham Conditions of Approval (CoA) (SSI 15_7400) as modified – dated 9 January 2018;

• The Sydney Metro City and Southwest - Environmental Impact Statement, dated 3rd May 2016;

• The Sydney Metro City and Southwest – Submissions and Preferred Infrastructure Report, dated October 2016;

• The Sydney Metro City and Southwest – Chatswood to Sydenham Modification 2 – Central Walk – Sydney Metro City and Southwest – (SSI Mod 2) – Determined on 21 December 2017.

• Sydney Metro City & Southwest - Chatswood to Sydenham Staging Report (Sydney Metro Delivery Office, February 2018)

• The Sydney Metro Construction Environmental Management Framework (CEMF) v3;

• Managing Urban Stormwater: Soils and Construction 4th Edition (Landcom, 2004);

• IS Technical Manual V1.2 (Infrastructure Sustainability Council of Australia); and

• Applicable legislative obligations.




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• NSW State Government’s Flood Prone Lands Policy” as outlined in the “NSW State Governments 2005 Floodplain Development Manual”.

The Compliance Matrix in Appendix A provides an analysis of how the CSWMP complies with CoAs, Environmental Performance Outcomes and the CEMF. Appendix B outlines the consultation undertaken with external government agencies, the outcomes of the reviews and any follow up actions required.

2.2 Guidelines

Additional guidelines and standards relating to the management of soil and water include:

• Landcom (2004). Managing Urban Stormwater: Soils and Construction. (Volume 1 of the ‘Blue Book’).

• DECC (2008). Managing Urban Stormwater: Soils and Construction. Volume 2D: Main Road Construction. (Volume 2D of the ‘Blue Book’).

• ANZECC (2000). Australian and New Zealand Guidelines for Fresh and Marine Water Quality (collectively known as the ‘ANZECC Guidelines’).

• ASSMAC (1998). Acid Sulphate Soil Manual. Acid Sulphate Soil Management Advisory Committee, NSW.

• Transport for NSW’s Water Discharge and Re-use Guideline.

• Infrastructure Sustainability Council of Australia - IS Technical Manual V1.2.

• EPA (2014) Waste Classification Guideline.

2.3 ISCA

The Project will pursue a rating under the IS Rating Scheme V1.2. This plan relates to several of the IS credits.

2.3.1 Dis-1 Receiving Water Quality

Monitoring and modelling of water discharges and receiving waters demonstrates no adverse impact on receiving water environmental values during construction.

2.3.2 Lan-2 Conservation of on-site resources

All subsoil and topsoil impacted by the project is separated and protected from degradation, erosion or mixing with fill or waste. 95% of all topsoil (by volume) retains its productivity and is beneficially re-used on or nearby to the project. Opportunities to improve topsoil productivity of previously disturbed areas have been identified and incorporated into the project.

2.3.3 Lan-3 Contamination and Remediation

Site assessment follows the recommended approach in Schedule A 'Recommended general process for assessment of site contamination' of National Environment Protection (Assessment of Site Contamination) Measure 1999. Remediation options are identified and selected using a sustainability hierarchy. Sustainability appraisal of remediation options is undertaken against the sustainability indicators in Table 1 of 'A Framework for Assessing the Sustainability of Soil and Groundwater Remediation'. The effectiveness and durability of the remedial solution, and maintenance and monitoring, have been considered over the lifetime of the infrastructure and beyond.




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2.3.4 Wat-1 Water Use Monitoring and Reduction

Monitoring and modelling demonstrates reduction of total water use by 5 – 20% below a reference footprint.

2.3.5 Wat-2 Water Saving Opportunities

All feasible opportunities with a financial payback of four years or less have been implemented. Measures to minimise the risk of water losses have been implemented (including e.g. frequency of meter readings, excavation staff awareness of water mains running through site).

2.4 LORAC Severe Environmental Risks

LOR is committed to implementing necessary measures to negate the risk of severe environmental risks where possible and when relevant to a given project. A Severe Environmental Risk (SER) as defined in the LOR EMS is an activity if not managed effectively could eventuate in severe environmental impacts resulting in permanent or long-term damage to the environment that is not easily rectified. They would substantially alter the receiving environment and result in a significant impact on the project’s and Laing O’Rourke’s environmental policy and objectives. Each SER provides clear guidance on the requirements and control measures that when implemented are intended to manage these risks. They describe the critical controls that must be in place, demonstrated and working effectively such that severe environmental impacts are prevented. All SER’s addressed in this management plan can be located in Appendix D which also details where within this plan they are addressed.

2.5 Issue, Revision and Re-issue

The initial issue of this plan has been reviewed by the Environmental Manager to ensure it meets the requirements of the current Environmental Management System and policy, contract, specifications and standards. The plan is approved for use on the project by the Project Leader. Evidence of initial review and approval is noted on Quality Assurance Statement on the review page of this document.

In accordance with CoA C7, the CEMP and sub-plans were endorsed by the Sydney Metro Environmental Representative (ER) and then submitted to the Secretary for approval no later than one (1) month before the commencement of construction or within another timeframe agreed with the Secretary.

Revisions of this sub plan may be required throughout the duration of the project to reflect changing circumstances or identified deficiencies.

Revisions may result from:

• Management Review; • Audit (either internal or by external parties); • Client complaints or non-conformance reports; and/or • Changes to the Company’s standard system.

It is expected that the Environmental Audits and Management Reviews will be within 3 months of commencing construction on site and approximately annually thereafter. The CEMP and sub-plans would be subsequently reviewed and updated by the Environmental Manager on an annual basis or as required. Updates to this plan are numbered consecutively and issued to holders of controlled copies.




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The CEMP and CEMP sub-plans, as approved by the Secretary, including any minor amendments approved by the ER, must be implemented for the duration of construction.

Revised versions of the CEMP and sub-plans will be updated on Teambinder and notifications sent to the Project team.

Roles and Responsibilities

The roles and responsibilities of key Project Personnel with respect to soil and water are as follows:

Table 2 Roles and Responsibilities

Project Director Managing the delivery of the CSMW project including overseeing implementation of soil and water management measures.

Act as Contractor’s Representative.

Construction Director Managing the Construction of the CSMW project including assisting in overseeing implementation of soil and water management measures.

Act as Deputy Contractor’s Representative.

Project Environment Manager Oversee the implementation of all soil and water management initiatives.

Responsible for managing ongoing compliance with the CoA and environmental document requirements.

Commercial Manager Ensure that relevant soil and water management requirements are considered in procuring materials and services.

Construction Managers

Site Superintendent

Manage the delivery of the construction process, in relation to soil and water management across all sites in conjunction with the Project Environment Manager.

Sustainability Manager Track and report soil and water elements against sustainability targets.

Environment Coordinator Manage the on-ground application of soil and water management measures during construction (e.g. erosion and sediment control, water treatment and monitoring).

Monitor and report on soil and water management during construction.

Project Engineer Implement soil and water management activities during construction works.

Environmental Representative Provide a review and endorsement role to this plan

Conduct inspections to review and monitor implementation of Soil and Water Mitigation and Management Measures

Endorsement of ECM

Stakeholder and Community Relations Manager

Assist in complaint handling activities related to soil and water quality.

Existing Environment

The information in this section of the CSWMP is summarised from the Chatswood to Sydenham EIS.

4.1 Existing Soil Landscape

The Project traverses two soil landscape types identified by the Sydney 1:100,000 Soil Landscape Series Sheet 9130. These are the Deep Creek and Blacktown soil units. The EIS identified that the Lucas Heights soil unit is potentially located around the Central Station




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precinct, however a review of the OEH Soil Unit database1 confirms that the Lucas Height soil unit is not located within the Project’s footprint.

4.2 Deep Creek

Landscape – level to gently undulating alluvial floodplain draining the Hawkesbury Sandstone. Local reliefs of < 5 m and slopes of < 3%;

Soils – deep (> 200 cm) podzols on well drained terraces, siliceous sands on current floodplain, and humus podzols in low lying areas; and

Limitations – flooding, extreme soil erosion hazard, sedimentation hazard, localised very low fertility and permanently high water tables.

4.3 Blacktown

• Landscape – found on gently undulating rises on Wianamatta Group shales with local reliefs of up to 30 m and slopes of < 5%;

• Soils – shallow to moderately deep hard setting mottled texture soils, red and brown podzolic soils on crests grading to yellow podzolic soils on lower slopes and in drainage lines; and

• Limitations – moderately reactive, highly plastic subsoil, with low fertility and poor drainage.

It is noted that the project site is highly disturbed and soils on the site include imported materials.

4.4 Geology

The geology underlying Central Station consists of fill, residual soil, Ashfield Shale, Mittagong Formation and Hawkesbury Sandstone.

In contrast to alluvium, the permeability of shale, siltstone and sandstone is generally low to very low, with the majority of groundwater flow transmitted through joints and fractures rather than via the porous nature of the material.

4.5 Salinity

The Office of Environment and Heritage (OEH) NSW Soil and Land Information System contains data points identifying evidence of soil salinity at areas which have previously been sampled. There was no evidence within this database to suggest soil salinity at any point along the project alignment. According to the OEH, urban salinity is not considered to be an issue for areas along the project alignment. As soil salinity is unlikely to be present along the project alignment, salinity related impacts on groundwater resources and hydrology are not expected.

4.6 Acid Sulphate Soils

The Australian Soil Resource Information System (CSIRO, 2015) was searched to identify the probability for acid sulfate soils (ASS) to be present within the CSMW project area. The probability for the presence of ASS at the CSMW project area was deemed to be low.

4.7 Contamination

A detailed contamination assessment of the proposed Central Walk Concourse and the




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Metro Box construction works was undertaken for TfNSW (the Sydney Metro City and Southwest, Central Station Contamination Assessment, GHD 2017) and an Environmental Site Assessment of the old gasworks site (Targeted ESA -Central Station Gasworks, Golder - Douglas, 2017) have been undertaken on the CSMW site. These assessments were conducted in accordance with the Contaminated Land Management Act 1997 (NSW). Information contained in these assessments have been updated to inform the development of Remedial Action Plans (RAP) for CSM. Refer to the RAPs for further information.

4.8 Gasworks Related Contamination

Three gasworks were previously operated within the railway yards immediately to the south west of Central Station. The gasworks were used for the production of gas to light carriages and yards. The historical operation of these gasworks represents a potential source of contamination including hydrocarbons, heavy metals and metalloids in soil and groundwater and potential vapour issues considering the proposed sub-surface excavation. A single gasworks tank was uncovered in the South Western corner of the Metro Box. Additional investigations were conducted and an addendum Remedial Action Plan RAP for the Metro Box was prepared.

Initial investigations of a soil, slurry and groundwater sample indicated that the concentrations of TRH and BTEX, benzene, PAH, cyanide, ammonia, sulphate and sulphide exceeded the human health screening levels for commercial industrial for vapour exposure, and direct physical contact pathway. The results of these findings prompted further investigation and remediation actions included but not limited to:

- Complete removal of encountered gas works wastes to 6m (including any contaminated or contacted material, brick and concrete works).

- Partial shut off structure on the Metro Box perimeter piles:

o Increase of shotcrete liner on the Metro Box perimeter walls from 150mm to 250mm in areas affected by the Gasworks.

o Inclusion of a sika waterproof liner to prevent groundwater ingress into the metro box.

o Inclusion of a drainage system to direct groundwater to the track drainage system.

- Preparation of a Remedial Action Plan for the gasworks. Refer to the Addendum Metro Box RAP for further information.

4.9 Site Surface Water

The Project forms part of the Darling Harbour and Blackwattle Bay catchments with water from the area discharging into Sydney Harbour. The catchment area is highly urbanised with surface water generally collected by developed stormwater networks. Surface water is collected by the rail corridor drainage system and connects to larger trunk systems draining around and under the CSM site. Rail corridor drainage in the northern half of the site connects to drainage in Eddy Avenue or a trunk drain under the site near Devonshire Street, both of which are part of the Darling Harbour catchment. Rail drainage in the southern half of the site connects to trunk mains under the site from Prince Alfred Park that are part of the Blackwattle Bay catchment.

In Sydney Yard, the access routes and LOR laydown areas will be concreted, and the remaining areas will be refreshed with ballast / DGB (refer to Figure 1.1 and 1.3 in Section 1 of this plan). The concrete access routes would be kept clean with street sweepers. In-drain




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proprietary sediment traps will be installed and maintained in Sydney Yard.

Surface water quality associated with the Project is largely influenced by ‘point source’ water pollution (for example, from stormwater drains) and diffuse water pollution (for example, from urban runoff that does not enter stormwater drains). The management approach is to capture all stormwater flows from the Eastern Entrance, Central Walk, the transport deck of the Metro Box and inflow groundwater and treat through a Water Treatment Plant (WTP).

4.10 Receiving Water Quality

OEH measures the recreational water quality of Sydney’s harbours and surrounding beaches through the Beachwatch program. According to Central Sydney State of the Beaches 2014–2015 (Office of Environment and Heritage Beachwatch, 2015), the water quality over this 12-month period, located within the Sydney Harbour catchment (incorporating both the Darling Harbour and Blackwattle Bay areas) was considered to be ‘good’.

The M4-M5 Link SSI EIS (Vol 2H App Q) study of existing water quality of bays, canals, and rivers within the Sydney Region found the concentration of heavy metals (Zinc, Copper, Chromium etc) were consistently higher than the 95% Species Protection Criteria of the ANZECC Water Quality Guidelines. The elevated heavy metal concentrations were recorded in waterbodies adjacent to and sharing waters with Blackwattle Bay, including Rozelle Bay and White Bay.

Figure 4.1 – Licenced discharge locations as per EPL 21148.




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4.11 Flooding

Urbanised areas of Surry Hills drain towards Central Station from the east. The main overland flow paths that approach Central Station are from:

• Foveaux Street, where floodwaters continue west down Eddy Avenue toward George Street; and

• Devonshire Street and Prince Alfred Park, where floodwaters enter the Central Station site and pond in low-lying sections of the rail track next to Prince Alfred Park in events as frequent as the two-year average recurrence interval.

Due to the highly urbanised drainage catchments surrounding the project area, flooding behaviour is expected to be largely controlled by the capacity of stormwater drainage systems and roadways that form overland flow paths. Construction activities may result in a minor redistribution of some surface water flows within the project footprint but would be captured within the site’s proposed stormwater drainage system. However, it is unlikely that the redistribution of flows would affect the performance of downstream drainage infrastructure or affect private properties.

It is estimated that peak flooding, resulting from a 10-year storm event using the Rational Method Equation, would result in 230 litres/second inflow to the site. Over a five minute rainfall event this would equate to 69,000 litres captured on the traffic deck of the station box. This would take a WTP with, a 10 litre/second capacity (i.e. the WTP sizing proposed for the project), 3.2 hours to clear.

Preliminary stormwater and flooding analysis has been undertaken during the design phase and flooding is not considered an issue of concern for the Central Station precinct. As such, flood reports, modelling and GIS outputs are not required as the site is not on flood prone land. As a result of this, a Stormwater and Flooding Management Plan is not required.




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Aspects and Potential Impacts

The key aspects and potential impacts associated with the management of soil and water during the delivery of works are listed in Table 3. The risk assessment has been undertaken in accordance with the risk process and definitions contained in Appendix C of the CEMP.

These identified risks have been taken into account in the development of the soil and water management plan and site-specific procedures for the works.

Table 3: Aspects and Potential Impacts

Risk Assessment Rankings: >17 = Extreme/unacceptable 10 - 16 = High 5 - 9 = Medium 1 - 4 = Low

Aspect Potential Environmental Impact Initial Risk Rating Control Measures Residual Risk Rating

P X C = Risk P X C = Risk

Sediment laden runoff from construction works leaving site.

Degradation of local watercourses.

Increased turbidity in local water ways resulting in impact on aquatic life.

Potential impact on traffic safety.

Potential for sediment laden runoff during rainfall.

Potential for generation of dust.

Fines for non-compliant water escaping site.

3 3 9 Control Measures as per the CSM Soil and Water Management Plan to be implemented.

Install stormwater drainage protection within the project area.

Use of the Water Treatment Plant

Conduct regular inspection of drains and replace protections where required.

Ensure measures are inspected and maintained as the works progress and also prior to and post rainfall events.

Provide training and awareness on the need to prevent pollution.

Relevant people to undertake Erosion and Sediment Control training.

1 3 3

Stockpiling of vegetation and topsoil.

Wind and water erosion causing weed/seed dispersion offsite.

Location of stockpiling next to waterways causing weeds/seeds to disperse from construction site.

2 3 6 Limited existing vegetation on site.

Vegetation will be mulched and immediately removed from site.

Utilise appropriate locations for stockpiling (away from waterways, watercourses, drains).

1 3 3




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Minimise stockpiling / Use temporary stockpiling

Cover stockpiles if left for extended periods.

Non-compliant water from construction works discharged from site

Non-compliant water entering stormwater system waterways (i.e. polluting - not compliant with discharge criteria).


Groundwater treated on site prior to reuse or discharge.

Induction and toolbox talks

Toolbox training on site procedures for water discharge (see Appendix I of CEMP)

Educate site staff on licence conditions and consequences of prosecution

Environmental Manager/representative to approve all water discharges from site in accordance with CSWMP.

ERSED training for relevant staff.

1 3 3

Works with the potential to intercept Groundwater table

Groundwater entering excavations without appropriate safeguards onsite could lead to ground water contamination.

3 3 9 Control Measures as per the CSM Groundwater Management Plan to be implemented.

Groundwater treated on site prior to discharge.

Induction and toolbox talks

Toolbox training on site procedures for water discharge

Educate site staff on licence conditions and consequences of prosecution

Environmental Manager/delegate to approve all water discharges from site

2 3 6

Flooding of Central Station and surrounds

Contamination of floodwaters by sewage, fuels and/or chemicals onsite

Potential for floodwaters to impact works within Central Station

Potential re-direction of flood waters

beyond work site as a result of works at

Central Station


Install stormwater drainage protection within the project area.

Conduct regular inspection of drains and replace protections where required.

Ensure measures are inspected and maintained as the works progress and also prior to and post rainfall events.

2 2 4




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Provide training and awareness on the need to prevent pollution.

Management of contaminated or untreated materials

Non-compliant material and contaminated water entering surrounding waterways.

Decrease in health of nearby ecosystems.

3 3 9 Implement Site Contamination Reports

Develop contamination management procedures and protocols.

Identify any contamination hotspots and incorporate procedures for these locations into construction documentation.

Develop unexpected finds procedures.

Induct personnel on unexpected finds procedure.

2 3 6

Potential for discovery of unexpected contaminated spoil during construction.

Health effects resulting from airborne contamination, e.g. asbestos.

Complaints received from odours released during excavations.

Classification of spoil is changed and disposal options altered, costs incurred associated with disposal of higher classification of waste.

3 3 9 If contaminated soil is encountered, all works are to stop in the vicinity of the find and investigations commence.

Induct personnel on location, type, nature, concentration of contaminants on site if found.

Development of a Remediation Action Plan (RAP).

Implementation of an Unexpected Finds Protocol

2 3 6

Encountering asbestos / contaminated material on site.

Transfer of material into previously uncontaminated area (outside work site) causing new contamination.

4 3 12 Completion of HazMat surveys.

Inspections of excavated and filled surfaces would be made during construction to determine the presence of visible asbestos.

Conduct further site investigations to determine the presence and extent of contamination prior to construction works commencing

Contaminated soils would not be stockpiled on the structural fill layer or formation layers to avoid cross contamination.

Stockpile materials separately.

All contaminated stockpiles and concrete washouts to be located on hardstand or impermeable builder’s plastic.

Implementation of an Unexpected Finds Protocol.

2 3 6




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Discharge of contaminated water from within site boundary during rainfall

• Contamination of receiving waters

Contamination of soils downstream of site

4 3 12 All contaminated stockpiles and concrete washouts to be located on hardstand or impermeable builder’s plastic.

All potentially contaminated water directed through a water treatment or disposed to a licenced treatment facility off site.

Implement recommendations of the Site Audit Report.

2 3 6




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Soil and Water Management

6.1 Erosion and Sediment Control

6.1.1 General Principles

• Due to the topography and nature of the Project construction, all stormwater and construction water captured in the Eastern Entrance, Central Walk, and Metro Box will be retained, managed and treated on site (with the exception of extreme weather events).

• In Sydney Yard site haulage roads will be concreted which will minimise sedimentation risk.

• Dial before you dig searches and non-destructive digging would be carried out to identify the presence of underground utilities.

• Environmental protection during construction will involve the installation, use and maintenance of a number of temporary and permanent erosion and sediment control measures as required in accordance with the following principles:

o Before undertaking any construction work (including any earthmoving or vegetation removal works), implement all soil and water management works required to minimise pollution of waters;

o All erosion and sediment controls will be installed in accordance with best-practice guidelines such as the NSW Blue Book Volumes 1 and 2D (Landcom, 2004 and DECC, 2008) and Best Practice Erosion and Sediment Control (IECA, 2008);

o Maintaining ground cover for as long possible to prevent erosion and sedimentation;

o Diversion of ‘clean’ run-off from offsite around or through the worksite without it contacting exposed soils or mixing with ‘dirty’ onsite water;

o All stormwater and construction water runoff in the station box footprint and from the Eastern concourse will effectively be retained on site and processed through a WTP prior to discharge for use on site (e.g. dust control) or to stormwater. Where water is contaminated and does not meet water quality discharge standards, it will be disposed of offsite at an appropriately licenced facility in accordance with the Sydney Metro Water Discharge and Reuse Procedure;

o Maintaining existing drainage infrastructure wherever possible;

o Minimisation of soil erosion and mobilisation of sediment during rain events;

o Use of suitable sediment retention structures and control measures to filter or retain mobilised sediment generated during rain events over surface disturbances;

o Maximum sediment capture through effective positioning of temporary erosion and sediment control structures;

o Progressive rehabilitation and/or stabilisation of completed areas to minimise erosion hazard;

o Regular inspection and maintenance of all erosion and sediment controls to ensure they are effective;

o Use of water efficient fittings and fixtures for all temporary site facilities;

o Targeted training on ERSED Control principles for key staff;

o Ensure that any road, footpath, shared path or cycleway which is open to the public is at all times kept free of mud, dirt, dust, deleterious material, debris, obstructions and trip hazards arising from CSMW activities; and




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o Install, maintain and utilise appropriate site exit controls. These measures would be put in place to mitigate the risk of any loss of soils, fuels, lubricants, load or other substances, whether in the form of duct, liquids, solids or otherwise. Any spillage or build-up of such material or debris would be cleaned up promptly.

6.1.2 Resources

Ultimate responsibility for erosion and sediment control will rest with the Site Supervisors, who will be responsible for the on-ground installation and maintenance of erosion and sediment controls. This would include (although is not limited to):

• Hard standing and deployment of spray-on soil stabilisers as required;

• Installation, cleaning and maintenance of controls such as sediment fences, gravel socks, inlet filters, sandbags etc;

• Installation of temporary drain proprietary gross pollutant traps to retain sediment; and

• All dewatering activities.

Relevant personnel will receive training and ongoing toolbox talks on installation and maintenance of erosion and sediment controls.

6.1.3 Sediment Basins

Sediment basins are not required during the construction stage. As discussed in Section 6.1.1 all water run-off within the Eastern Entrance, Central Walk and the Metro Box and will be captured and treated through a WTP. Erosion and sediment impacts can be sufficiently mitigated by other measures as included in Section 6.1.4.

6.1.4 Erosion and Sediment Control Plans

In accordance with CoA E65, all reasonably practicable erosion and sediment controls will be installed and appropriately maintained to minimise any water pollution. When implementing such controls, any relevant guidance in the Managing Urban Stormwater Series must be considered. Erosion and Sediment Control Plans (ESCPs) will be developed for the Project area and measures will be designed as a minimum for the 80th percentile; 5-day rainfall event. The ESCPs will require sign-off by the Environment Manager prior to implementation and are included in the Environmental Control Maps in Appendix L of the CEMP.

The ESCP’s will contain the following key management measures to ensure that all erosion and sediment control measures are effective within an 80th percentile; 5-day rainfall event:

Site Drainage

• Upslope “clean” water will be diverted around the construction site using diversion bunds. This water will be discharged so as not to impact neighbouring properties or cause erosion.

• The Sydney Yard access routes and laydown areas will be concreted and drained to a central point. Stormwater will be filtered through a proprietary in-drain sediment device. All remaining areas will be covered in ballast or DGB20.

• All captured stormwater within the Eastern Entrance, Central Walk and Metro station box will be processed through a WTP prior to discharge for use on site (e.g. dust control) or to stormwater. Where water is contaminated and does not meet water quality discharge standards, it will be disposed of offsite at an appropriately licenced facility in accordance with the Sydney Metro Water Discharge and Reuse Procedure.

[SMCSWCSM-LORSMC-EM-PLN-103000] [August 2020]



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Site Entry and Access Requirements

• Establish stabilised access points with rumble grids or wheel washes to prevent mud tracking on roads.

• Clearly delineate access points.

• Use of street sweepers.

• Haul roads will be sealed and regularly cleaned.

• Appropriate site speed limits will be imposed and signed on haul routes.

• Exclusion zones will be designated on construction sites to limit disturbance.

Soil Stripping and Stockpiling

• Excavated material will generally be loaded on trucks and removed from site.

• Where stockpiles are required, diversion drains/bunds are to be installed on the high side of stockpiles if run—off from upslope lands could impact on the stockpile.

• As much as is feasible, mulched vegetation, topsoil and subsoil (if applicable) are to be stockpiled separately.

• Stockpiles will be secured with sediment fence downslope, diversion berm/drains upslope, and covered with geofabric when not in use and will be stabilised within 10 days of completion of formation to at least 70% cover. Long-term stockpiles with material continually coming or going will have a working face at one end and will be stabilised at the other.

• Topsoil and mulch stockpiles will be constructed to no more than 2m in height where possible.

• Stockpiles will be battered down to a maximum slope of 2:1 (H:V) where space permits.

• Material transport from site to surrounding pavement surfaces will be minimised.

Dust Control

• Dust suppression will be carried out whenever necessary to minimise sediments becoming air borne due to wind erosion.

• Wherever possible, water detained onsite will be re-used for dust control.

Stabilisation

• Undertake progressive stabilisation of ground surfaces as quickly as possible as they are completed rather than at the end of the works program.

• Access routes will be concreted to prevent scour and mud tracking.

• Temporary ground covers such as ballast or DGB or semi-permanent hard stand will be used to stabilise large surface areas.

• Scour protection and energy dissipation will be used around discharge points at local points to reduce erosion where necessary.

Sediment Controls

• There are no areas where run-off from disturbed areas can leave the site without sediment controls.

• Sediment controls will be installed around stormwater inlet pits where appropriate and where they won’t cause or exacerbate flooding. Traffic management and safety will need to be considered if installing such devices on or near live traffic.




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• Maximise the diversion of turbid construction runoff into sediment retention devices such as sediment sumps, sediment fences and other sediment traps.

• Sediment controls are maintained and have a minimum of 70% sediment storage capacity

• All erosion and sediment controls will be inspected at least weekly, before forecast rain events, before a site closure of two days or more, and after rainfall exceeding 20 mm in 24 hours. Maintenance will be carried out as soon as practicable.

• Concrete washout will be confined to designated concrete washout locations or trucks are required to washout at the concrete supplier’s depot.

• Clean water diversions will be constructed and stabilised around work areas.

• No stockpiles of materials or storage of fuels or chemicals will be located adjacent to the existing culverts.

• Erosion and sediment control plans will be reviewed for each stage of works as deemed necessary and be included as part of the Environmental Control Maps prepared for the Project.

6.2 Surface Water Management

6.2.1 Water Treatment Plant

All captured stormwater and groundwater within the Eastern Entrance, Central Walk and Metro station box will be processed through a WTP prior to discharge for use on site (e.g. dust control) or to stormwater. LORAC’s subcontractor, EnviroPacific Services Pty Ltd (EPS) are responsible for the design, installation, management, operation, inspection, maintenance and repairs of the WTP. The WTP was constructed on site at the end of 2019. The WTP is managed in accordance with the EPS WTP Water Quality Management Plan (WTP WQMP).

In accordance with the Ministers Condition of Approval, the nominated trigger values set in the WTP WQMP for managing discharge is in accordance with the NSW Water Quality Objectives / ANZECC Marine Quality Guidelines. Compliance with the EPL discharge criteria will be confirmed by sensors that monitor pH and TSS continuously. Achievement of the WQO / ANZECC guidelines will be verified by weekly sampling and testing of treated water.

The following controls, procedures and protocols will be implemented to prevent, minimise and / or mitigate discharges to the environment.

• The WTP is fully bunded in case there is a tank failure or chemical spill within the WTP footprint.

• The WTP is designed to be operated automatically using the plant’s Programmable Logic Controller (PLC). During continuous operation, the WTP is designed to use a series of automatic sensors to monitor and discharge water by gravity to a stormwater drain via Environmental Protection Licence Discharge Point 1 (EPL1). All discharges to stormwater via EPL1 are controlled by an automatic cut-off valve if the discharge does not meet EPL water quality criteria. Continuous monitoring of the water is conducted using built in instrumentation and alarms system. If the water is measured to be out of specification, the automated system will prevent discharge by closing the discharge valve. The system may automatically recover (e.g by pH correction dosing) and recommence discharge or may require the water to be sent back to the head of the system (e.g in the case of high TSS) for re-treating.




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• Alarms and emails are sent out to EPS operators and managers if water does not meet specification. EPS must notify LORAC staff of plant issues or water outside of the prescribed EPL concentration limits. If the operator is onsite, they will investigate the cause of the alarm immediately. If the operator is not present at site or the incident occurs outside of normal operation hours, then the operator will attempt to fix the problem remotely. If this is not possible then the operator will assess the urgency of the situation and attend site if necessary to rectify the issue. EPS maintain a team with personnel on-call for these requirements.

• If sample results of treated water does not meet project water quality criteria, If project trigger levels are exceeded, the WTP operator will notify LORAC via email and phone call and maintenance of the WTP is undertaken. The continuous treatment cycle is changed to a batch cycle until all parameters are below the nominated trigger values. Treated water from the batches that meets EPL criteria is pumped via an alternative line to Environmental Protection Licence Point 2 (EPL2) onto land.

6.2.2 Environmental Protection Licence 21148

There are two licenced discharge points for the project. EPL1 discharges directly to stormwater located in Sydney Yard and EPL2 discharges to land within the Track 12 cess at the southern end of Sydney Yard. EPL2 uses an agricultural pipe to diffuse discharge allowing water to percolate through the ballast and into the ground. The closest stormwater pit (lobster cage) from EPL2 is located at least 25m from discharge location (Figure 6.1).

Discharged water must comply with the EPL criteria prior to discharge. As per Table 4 below, the treated water will be managed and tested in accordance with the requirements of the Project EPL 21148. Compliance with the EPL discharge criteria will be confirmed by sensors that monitor pH and TSS continuously.

Table 4- EPL requirements for water treatment plant discharge

Condition Measure

P1.1 The following points referred to in the table are identified in this licence for the purposes of the monitoring and/or the setting of limits for discharges of pollutants to water from the point.

Discharge of water treatment plant to stormwater system – Sydney Trains Yard (Easting: 333891, Northing: 6248995, MGA56, GDA94 - Refer Discharge Point Map on EPA Electronic File EF18/31724).

L1.1 Except as may be expressly provided in any other condition of this licence, the licensee must comply with section 120 of the Protection of the Environment Operations Act 1997.

L2.1 For each monitoring/discharge point or utilisation area specified in the table\s below (by a point number), the concentration of a pollutant discharged at that point, or applied to that area, must not exceed the concentration limits specified for that pollutant in the table.

L2.2

Where a pH quality limit is specified in the table, the specified percentage of samples must be within the specified ranges.

L2.3 To avoid any doubt, this condition does not authorise the pollution of waters by any pollutant other than those specified in the table\s.

L2.4 Water and/or Land Concentration Limits

Oil and grease- not visible

pH 6.5-8.5

Total Suspended Solids (mg/L) 50




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Condition Measure

L2.5 If the licensee uses turbidity (NTU) in place of TSS to determine compliance with Conditions L2.1 and L2.4 the licensee must develop a statistical correlation which identifies the relationship between NTU and TSS for water quality in the sediment basins, water treatment plants and excavations in order to determine the NTU equivalent of 50 mg/L TSS before NTU is used.

L2.6 The licensee must provide the EPA with a copy of the statistical assessment methodology and results before using NTU in place of TSS.

L2.7 The licensee must develop and implement a method to enable the ongoing verification of the relationship between NTU and TSS.

L2. The licensee must provide the EPA with any amendments the licensee makes to the statistical correlation as a result of the ongoing verification required by Condition L2.7 before using the revised statistical correlation.

O5.9 A water quality sampling point is to be located at the water discharge point/'s identified in condition P1.1 and a safe access path is to be provided to the sampling point to readily allow for the collection of samples.

M1.3 The following records must be kept in respect of any samples required to be collected for the purposes of this licence:

a) the date(s) on which the sample was taken;

b) the time(s) at which the sample was collected;

c) the point at which the sample was taken; and

d) the name of the person who collected the sample.

M2.1 For each monitoring/discharge point or utilisation area specified below (by a point number), the licensee must monitor (by sampling and obtaining results by analysis) the concentration of each pollutant specified in Column 1. The licensee must use the sampling method, units of measure, and sample at the frequency, specified opposite in the other columns:

M2.2 Water and/ or Land Monitoring Requirements

POINT 1

Pollutant Units of Measure Frequency Sampling Method

Oil and Grease

Visible Special Frequency 1

Visual Inspection

pH pH Special Frequency 2

In situ

Total suspended solids

milligrams per litre

Special Frequency 3

Grab sample

POINT 2


Oil and Grease

Visible Special Frequency 1

Visual Inspection

pH pH Special Frequency 2

In situ

Total suspended solids

milligrams per litre

Special Frequency 3

Grab sample

M2.3 For the purposes of Conditions M2.1, the term ‘Special Frequency 1’ means:

(a) Less than 24hours prior to controlled discharge and daily for any controlled discharge.




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Figure 6.1 – Licenced discharge locations as per EPL 21148.

6.2.3 NSW Water Quality Objectives

As discussed in Section 4.10, the Project forms part of the Darling Harbour catchment and Blackwattle Bay catchment. Specific Water Quality Objectives have been derived for the catchment in line with the NSW Water Quality Objectives. Catchment mapping classifies the project site as a waterway that is “affected by urban development”. The Environmental Values identified for the catchment are as follows:

• Aquatic ecosystems;

• Visual amenity;

• Secondary contact recreation; and

• Primary contact recreation in the longer term.

The most applicable value for Blackwattle Bay and Darling Harbour is for Aquatic Ecosystems. Water will be treated to maintain the Aquatic Ecosystem Values which in turn meets the remaining Values identified for the catchment.

In accordance with the Ministers Condition of Approval E107, all water discharge offsite must contribute to the NSW Water Quality Objectives (NSW WQO). The NSW WQO’s are the environmental values and long-term goals for consideration when assessing and managing the likely impact of activities on waterways. They are not intended to be applied directly as regulatory criteria, limits or conditions but are one factor to be considered by industry, the community, planning authorities or regulators when making decisions affecting the future of a waterway.




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The nominated target trigger values set in the WTP WQMP for managing discharge is in accordance with the 95% Species Protection Criteria. Compliance with the ANZECC guidelines be verified by weekly sampling and testing of treated water. If project trigger levels are exceeded, maintenance of the WTP is undertaken and the continuous treatment cycle is changed to a batch cycle until all parameters are below the nominated trigger values. Treated water from the batches that meets EPL criteria is pumped via an alternative line to EPL2 onto land.

Figure 6.2 - WTP discharge in trunk stormwater system

6.2.4 Minimise Water Demand and Waste Water Production

The temporary construction site offices shall be fitted with ablutions featuring water efficient controls, fixtures and fittings – i.e. water efficient taps, WCs, urinals etc.

Dust suppression (around the Sydney Yard area of the site) use of water will be limited (compared to the business as usual civil construction site) due to the largely underground nature of the works and surface area constrained by rail. However underground dust suppression at the cutting face of the excavation activity will largely be controlled using negative pressure venting systems and extraction fans fitted with dry filtration systems (e.g. cyclonic or bag), not water based.

Water efficient misting systems will be used in the truck loading area.

Demand limiting techniques to these required systems assists in limiting the volume of waste water to be discharged to sewer or offsite via the water treatment systems




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6.2.5 Reuse

Where practicable, any water collected in excavations will be reused within the site (e.g. dust suppression). The Sydney Metro’s form “Approval to Discharge or Reuse Water SM ES-FT-412” regulates both onsite reuse and offsite point source discharge and may be used pending assessment of the Environmental Manager (refer to Appendix I of the CEMP). Prior to any discharge off the premises, or reuse within the premises, the Project Environment Manager (or delegate) must verify the water is suitable for reuse or discharge. Examples of water reuse include:

• Harvesting and reusing rainwater from roofs of temporary facilities; • Collecting, treating and reusing groundwater and stormwater via the water treatment

plant; • Using water efficient construction methods and equipment; and • Where required, providing designated sealed areas for equipment wash down.

6.2.6 Onsite Discharge

For onsite reuse or transferring stormwater within the project EPL boundary the following criteria will be utilised:

• pH – 6.5 to 8.5;

• No visible oil and grease;

• No potential for water to leave the site;

• No surface runoff will be generated from the reuse (reuse includes dust suppression, etc.);

• No potential for water to reach any watercourse;

• Other parameters as indicated by groundwater assessments.

6.2.7 Offsite Discharge

No water will be discharged off site until it is treated/tested and the process verified via a process proving system authorised by the Environmental Manager. This action would constitute a hold point. All stormwater and groundwater ingress to the Eastern Entrance, the Central Walk and in the Metro station box will be pumped through the WTP. Where water is unable to be brought to the WTP for treatment (i.e from the Eastern Entrance), it will be transported offsite to an appropriately licensed facility.

Discharges from the construction WTP would be monitored to ensure compliance with the discharge criteria in the environment protection licence (EPL) issued to the project and contribute towards achieving the NSW Water Quality Objectives in accordance with the CoA E107.

6.3 Water Efficiency

Both total and potable water consumption will be minimised during the construction phase. This will be achieved by preparing a water balance study (refer to Section 4.5 of the Sustainability Management Plan) prior to commencement of construction and identifying opportunities for water efficiency and reduction. Such opportunities will include:

• Where possible, using captured stormwater and water treated through the WTP for dust suppression, construction activities (e.g. during compaction), site cleaning, concrete truck washouts, etc.;

• Metering and monitoring potable and recycled water sources to identify and report on water use trends and identify any potential leaks;




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• Selection of construction equipment considers water efficiency of the equipment and associated construction methodology; and

• Use of water saving devices in areas such as toilets, hand basins, sinks, etc.

6.4 Refuelling, Chemicals and Spill Management

Hazardous substances and dangerous goods will be stored in accordance with the Storage and Handling of Dangerous Goods Code of Practice (WorkCover NSW, 2005) and Hazardous and Offensive Development Application Guidelines: Applying SEPP 33 (Department of Planning, 2011). Any hazardous substances used onsite will be undertaken in accordance with the following protocols and details on the Environmental Control Map (ECM):

• Hazardous substances will be stored onsite in lockable containers, in their original receptacles;

• Emergency spill kits will be kept on-site at all times. All staff will be made aware of the location of spill kits and be trained in their use;

• All hazardous substances will be clearly labelled and will have Hazardous Chemicals and Safety Data Sheets (SDS) affixed or available nearby. The SDS will be used to determine compatibility of hazardous chemicals to be stored together, i.e. no flammables with corrosives, not all corrosives compatible with each other, etc.;

• A roofed/covered bund sized to 110% of the total volume of stored receptacles will be established around any storage area for hazardous substances;

• Bunded storage areas in place for all fuels, chemicals and oils (minimum 110% of the stored capacity) including external bunded storage for generators with fuel storage capacity of greater than 100 litres;

• All generators have internal bunds. External bunded storage provided for generators and fuel storage systems that are stored over or within 20 metres of waterways or drain.

• All generator systems with external fuel storage are bunded and installed and commissioned by competent personnel

• Storage and handling of flammable or combustible liquids will be in accordance with OEH guidelines for Bunding and Spill Management, as well as AS 1940-2017 – The Storage and Handling of Flammable and Combustible Liquids;

• An up-to-date register of hazardous substances will be kept onsite at all times.

• Hazardous substances will only be used onsite as required, in accordance with the manufacturer/supplier instructions.

• Stormwater that collects in basins, excavations and drainage systems is treated and tested prior to discharge in accordance with the legislated requirements, license or approval requirements

• Any substances with the potential to impact water quality will be assessed by the Environment Manager to determine what environmental safeguards or procedures are required for that substance to minimise the risk of environmental harm.

• The use of any hazardous substance that could result in a spill will be undertaken away from drainage or stormwater lines and, wherever possible, within defined bunds.

• All spills or leakages will be immediately contained and absorbed. Routine inspections of all construction vehicles and equipment will be undertaken for evidence of fuel/oil leaks.




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• Vehicles and machinery will be properly maintained to minimise the risk of fuel/oil leaks.

• Hydraulic hoses are reviewed/inspected for wear and damage prior to the commencement of works. Damaged hoses are replaced. Sheathing is provided for exposed hydraulic and fuel lines.

• Spill Kits are located close to the piling works and maintained to ensure they are fully stocked.

• In the event of a spill, the Spill Management Procedure will be implemented. As set out in Section 9 the CEMP, the management of environmental incidents where material harm to the environment is caused or threatened will be managed in accordance with the Pollution Incident Response Management Plan.

• Construction plant, vehicles and equipment would be refuelled in designated re-fuelling areas located at a minimum distance of 50 metres from drainage lines or waterways, where possible.

6.5 Contamination

As noted in Section 4.7, there are a number of potential contamination issues on the Project. These may include contaminated soils, groundwater and vapour associated with the former use of the area as a gasworks and fill brought into the site during the initial construction of Central Station and associated tracks. The following measures will be implemented to mitigate risks associated with contamination encountered on the project site:

• Known contaminated areas will be clearly demarcated on site and within the ECM – this will be updated during the course of the project if additional areas of potential contamination are identified;

• The extent of gasworks contamination will be defined in the site assessment report as outlined in Section 4.7.

• A Remedial Action Plan will be implemented to minimise potential human health exposure gasworks waste;

• A vapour management plan for vapour/gas management will be developed in the event that vapour or hazardous ground gases are identified in the excavation area;

• Contaminated soils will be disposed of off-site at a waste facility licensed to receive that type of waste;

• In the event of unexpected finds of contamination, all works are to stop in the vicinity of the find, the Environmental Manager is to be notified and investigations commence as detailed further in Section 6.8; and

• When contamination is encountered, the Environment Manager will confirm whether the duty to notify under either the Contaminated Land Management Act 1997 and/or Protection of the Environment Operations Act 1997 have been triggered.

6.5.1 Remedial Action Plans

In accordance with CoA E66 and E67 the following process will be implemented to manage site contamination in the Eastern Entrance, Central Walk, the Metro station box and the Gasworks areas:

• Develop a Remedial Action Plans (RAP) based on Phase 1 and Phase 2 reports completed by TfNSW.




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• The RAPs would be developed in accordance with Managing Land Contamination: Planning Guidelines SEPP 55 – Remediation of Land (Department of Urban Affairs and Planning and Environment Protection Authority, 1998).

• The RAPs will address issues such as waste classification and segregation, stockpile management and tracking, waste tracking, mass balance calculations and reporting;

• The RAPs will assess potential remediation options to ensure whole of life costs are minimised.

• Practical contamination risk not captured within the RAPs will be managed through the development and implementation of a Construction Work Method Statement (CWMS).

• A NSW EPA Accredited Site Auditor must be engaged to the management of contamination;

• The Site Auditor must review and approve the RAPs;

• Implementation of the RAPs

• Monitor, review and report on outcomes of RAP implementation;

• Prepare Validation Reports; and

• Site Auditor review and approval of the Validation Report and issue of Site Auditor Statement by the Site Auditor

• A copy of the Site Audit Statement and Site Audit Report will be submitted to the Secretary and Council for their information no later than one (1) month before the commencement of operation.

6.5.2 Asbestos Removal

Identified fragments of Asbestos Containing Materials (ACM) on the surface and within miscellaneous stockpiles on site will be managed in accordance with the WHS Management Plan and a task specific Asbestos Removal Control Plan. Inductions and toolbox talks will be provided detailing the correct response if asbestos is encountered.

Removal will be by a licensed asbestos removal contractor who will produce the following:

• Asbestos removal licences for workers performing the removal works;

• A task specific SWMS;

• Evidence of notification to the relevant authority and asbestos removal permit;

• Where there is uncertainty as to whether the exposure standard may be exceeded, or if it is likely to be exceeded, then air monitoring must be performed by a competent person who is independent of the removalist;

• At the completion of the removal works a clearance certificate must be obtained from a competent person;

• A waste disposal certificate must be provided by the removalist following the completion of the works to prove that any asbestos containing material removed from the site has gone to an approved landfill facility; and

• Unless a specific exemption exists, asbestos waste must be tracked using the NSW EPA’s Waste Locate. Evidence of this is to be provided by the asbestos removalist.

6.5.3 Management of Hazardous Materials During Demolition

A Hazardous material survey will be completed for those buildings and structures suspected of containing hazardous materials (e.g. Asbestos) prior to their demolition, with additional




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information on the survey provided in the Construction Demolition Management Plan. A Hazardous Materials Pre-Demolition Survey Report has been prepared to assist with the mitigation of potential risks associated with the demolition of the Bounce Hotel.

6.6 Salinity

As discussed in Section 4.5, soil salinity is unlikely to be present and therefore salinity related impacts on infrastructure, soils, groundwater resources and hydrology are not expected. Should salinity be identified further investigation is to occur and additional measures would be put in place.

6.7 Acid Sulphate Soils Contingency Plan

As discussed in Section 4.6, ASS are unlikely to be present. Preliminary contamination assessments indicate that the action criteria within the Acid Sulphate Soils Manual (EPA, 1998) are not triggered and consequently, an Acid Sulphate Soil Management Plan is not required. In the unlikely event that the action criteria are triggered, then an ASS MP would be prepared in accordance within the Acid Sulphate Soil Manual.

6.8 Unexpected Finds Procedure

In the event of suspected/potential unexpected finds (including contaminated soil or groundwater of vapour associated with the previous gasworks area, asbestos, salinity, ASS, etc.), the following will occur:

• Cease work in the area of concern immediately;

• Isolate the area with barrier tape or any other physical barrier to prevent workers from entering the potentially contaminated location;

• Known contaminated areas will be clearly demarcated on site, within the ECM and within the GIS system;

• Report the area of concern to the Environment Manager and WHS Manager immediately. Nearby work groups would be notified;

• Environment Manager will engage a suitably qualified consultant to inspect the site and carry out an initial assessment of the nature and extent of the unexpected find; and

• The Consultant will advise what management is required in accordance with this plan and the contamination report.

The Unexpected Finds procedure will be implemented throughout the entire construction phase and is detailed further in Appendix C of this plan. The process to be followed is presented in Diagram 1 below.




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Diagram 1. Unexpected Finds Flowchart




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Water Quality Monitoring

As discussed in Section 6, all stormwater and construction water runoff from the Eastern Entrance, Central Walk, and Metro Box will be captured, managed and treated on site in the WTP prior to discharge for use on site (e.g. dust control) or to EPL1 or EPL2 discharge points. The discharge water will be monitored to ensure discharges meet the criteria detailed in Section 6.2. If water does not meet the discharge criteria it will either be re-processed through the WTP and re-assessed or additional appropriate mitigation measures determined and implemented to ensure discharges meet the specified criteria. If the water cannot meet the discharge criteria, the water would be transported off-site to a licenced facility. The WTP discharge will be regulated by the EPL and CoA 107. No water will be discharged from site without approval from Laing O’Rourke Environment Manager.

The ECM outlines the location of the WTP and licenced water discharge points. Results of this water quality monitoring will be recorded as required by the Environment Protection Licence. In addition, water quality monitoring results will be reported annually during construction and following the completion of the Project to the Department of Planning Industry and Environment, the Environment Protection Authority and the Council of Sydney City.

There are no receiving waters that require monitoring under the approval due to water quality being monitored at the licenced discharge point in accordance with the proposed Project EPL. Therefore no monitoring of adjacent creeks or watercourses will be undertaken as part of the Project

Training

All relevant site personnel working on site will undergo site induction training relating to soil and water issues. The training will cover the following issues such as:

• Legislative requirements (POEO Act, EPL etc.) including Section 120 (offence to pollute waters);

• Erosion and sediment control planning and hold points;

• Duty to notify of environmental harm (or the potential for it) including chain of reporting;

• Spill containment and management procedure;

• Storage and use of hazardous substances;

• Water reuse and discharge procedure;

• Maintenance of environmental controls (e.g. erosion and sediment controls); and

• Unexpected Finds.

Detailed training will be provided to key personnel regarding erosion and sediment control and water treatment devices. This training will include:

• Legislation as it applies to erosion and sediment control;

• Basics of soil management, handling and stockpiling;

• Appropriate use, installation and maintenance of various erosion and sediment control techniques;

• Effective site rehabilitation and stabilisation;




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• Use of erosion control techniques such as geotextiles, organic fibre mats, mulches and soil polymer stabilisers;

• Preparing, reading and interpreting Erosion and Sediment Control Plans;

• Typical controls around existing drains, maintenance of controls and WTP;

• Operation of the water treatment plans and relevant testing and reporting;

• Toolbox talks will also be used to further reinforce awareness of Soil and Water issues; and

• Further details regarding staff induction and training are outlined in Section 9 of the CEMP.

Monitoring, Auditing and Reporting

Laing O’Rourke will regularly review the Project to ensure compliance with this Plan. A regular inspection program for soil and water will be conducted as follows:

• Details of daily inspections undertaken by the Site Supervisor will be logged in their respective site diaries;

• Routine weekly inspections are to be conducted to monitor erosion and sediment controls in active worksites. Weekly inspections will be documented on the Environmental Inspection Form;

• Inspection of the operation of soil and water management works installed on the premises and undertake any works required to repair and/or maintain these controls: at least weekly during normal construction hours; prior to any major rainfall event forecasted daily; following a major rainfall event in any 24 hour period (>20mm), undertaken during heavy rainfall events if safe to do so; prior to any site closure of greater than 24 hours.

Typical records generated would include:

• Copies of current ESCPs for all active construction sites;

• Records of soil and water inspections undertaken;

• Observations and works undertaken to repair and/or maintain soil and water management works;

• Records of testing of any water prior to discharge;

• Records of discharge water from the construction site to the receiving environment;

• Records of potable and non-potable water consumption (including details of sources of non-potable water) and performance against targets established in the water balance study;

• Unexpected finds; and

• Records for contamination management – soil classification, spoil tracking, disposal dockets, remedial action plans, occupational hygienist clearances, and Site Auditor sign-offs.

For further information on the requirements for records refer to Section 15 of the CEMP.

Results and outcomes of inspections, monitoring and auditing will be reported internally on a monthly basis and reported to the ER and Sydney Metro on a quarterly basis. Six-monthly Construction Compliance Reports will be prepared to report on compliance with the Project Approval.

Environmental reporting will be undertaken in accordance with Sydney Metro City & Southwest Environmental Reporting Template SM ES-FT-421. Additional reporting




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requirements are included in Section 15 of the CEMP.

Any non-compliances arising out of the above monitoring, inspections and audits would be made aware to SM in a timely manner, in line with the Environmental Incident Classification and Reporting Procedure and the CEMP. A review of the appropriate documentation would be undertaken by LOR management to determine the corrective actions to ensure the non-compliance does not happen again.

A register would also be kept, identifying any non-compliances and documenting the corrective and preventative actions.

Review and Improvement

The CSWMP will be reviewed and updated at least annually. Laing O’Rourke will undertake the ongoing development, amendment and updating of the CSWMP to ensure it remains consistent with Project priorities, risk management, client requirements and Project objectives, taking into account:

• The status and progress of Laing O’Rourke’s activities;

• Changes in the design, delivery and operations processes and conditions;

• Lessons learnt during delivery;

• Changes in other related Project Plans;

• Requirements and matters not covered by the existing Project Plans;

• Changes to Project Plans as directed by TfNSW’s Representative under the Deed; and

• Where deemed appropriate in relation to items raised within inspections or audits.

The CEMP sub-plans must be developed in consultation with relevant government agencies. Where an agency(cies) request(s) is not included, the Proponent must provide the Secretary justification as to why. Details of all information requested by an agency to be included in a CEMP sub-plan as a result of consultation and copies of all correspondence from those agencies, must be provided with the relevant CEMP sub-plan.

The CEMP and CEMP sub-plans, as approved by the Secretary, including any minor amendments approved by the ER, must be implemented for the duration of construction. Where the CSSI is being staged, construction of that stage will not commence until the relevant CEMP and sub-plans have been approved by the Secretary.

Enquiries, Complaints and Incident Management

Environmental incidents and complaints are to be investigated, reported, documented, actioned and closed out as per the details provided in the Community Consultation Strategy and the CEMP.

Should any significant soil or water quality-related environmental incident occur, the EPA would be notified immediately and the Secretary also notified as soon as possible within 24 hours of the incident occurring and include the time and date, details of the incident and any non-compliance with the Project’s approval. This would be undertaken in accordance with the Project’s Pollution Incident Response Management Plan (PIRMP). The actions taken to address the incident would be undertaken within the timeframe determined by the Secretary or relevant public authority.




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Agency consultation

Laing O’Rourke has consulted with the City of Sydney, DPI – Water, the Office of Environment and Heritage, State Emergency Services and NSW Fire and Rescue in regards to the requirements outlined in Appendix B. Any comments or adjustments to the CSWMP as a result of agency consultation has been detailed in Appendix B and incorporated into the main text of this plan.


Sydney Metro City and Southwest, Central Station Main Works Project

Construction Soil and Water Management Plan

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Appendix A Construction Soil and Water Management Compliance Matrix

Measure Timing Requirement Responsibility Reference

Project Approval – Specific Management Plan Requirements

Where the terms of this approval require consultation with identified parties, details of the consultation undertaken, matters raised by the parties, and how the matters were considered must accompany the strategies, plans, programs, reviews, audits, protocols and the like submitted to the Secretary.

Prior to Construction

C2S SSI 15_7400 COA – A9

Environment Manager

Appendix B

From commencement of construction until completion of construction, the approved ER must:

(a) receive and respond to communications from the Secretary in relation to the environmental performance of the CSSI;

(b) consider and inform the Secretary on matters specified in the terms of this approval;

(c) consider and recommend any improvements that may be made to work practices to avoid or minimise adverse impact to the environment and to the community;

(d) review documents identified in Conditions C1, C3 and C9 and any other documents that are identified by the Secretary, to ensure they are consistent with requirements in or under this approval and if so: i) make a written statement to this effect before submission of such documents to

the Secretary (if those documents are required to be approved by the Secretary), or

ii) make a written statement to this effect before the implementation of such documents (if those documents are required to be submitted to the Secretary for information or are not required to be submitted to the Secretary);

(e) regularly monitor the implementation of environmental management related documents to ensure implementation is being carried out in accordance with what is stated in the document and the terms of this approval;

(f) review the Proponent’s notification of incidents in accordance with Condition A41 of this approval;

(g) as may be requested by the Secretary, help plan, attend or undertake Department audits of the CSSI, briefings, and site visits;


C2S SSI 15_7400 COA – A24

Environment Manager

Appendix B




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(h) if conflict arises between the Proponent and the community in relation to the environmental performance of the CSSI, follow the procedure in the Community Communication Strategy approved under Condition B3 of this approval to attempt to resolve the conflict, and if it cannot be resolved, notify the Secretary;

(i) review any draft consistency assessment that may be carried out by the Proponent, and provide advice on any additional mitigation measures required to minimise the impact of the work;

(j) (consider any minor amendments to be made to the documents listed in Conditions C1, C3 and C9 and any document that requires the approval of the Secretary (excluding noise and vibration documents) that comprise updating or are of an administrative or minor nature, and are consistent with the terms of this approval and the documents listed in Conditions C1, C3 and C9 or other documents approved by the Secretary and, if satisfied such amendment is necessary, approve the amendment. This does not include any modifications to the terms of this approval;

(k) assess the impacts of minor ancillary facilities as required by Condition A18 of this approval; and

(l) prepare and submit to the Secretary and other relevant regulatory agencies, for information, a monthly Environmental Representative Report detailing the ER’s actions and decisions on matters for which the ER was responsible in the preceding month (or other timeframe agreed with the Secretary). The Environmental Representative Report must be submitted within seven (7) days following the end of each month for the duration of works and construction of the CSSI, or as otherwise agreed with the Secretary.

The Secretary must be notified as soon as possible and in any event within 24 hours of any incident.

During Construction

C2S SSI 15_7400 COA – A41

Environment Manager

Section 11

Notification of an incident under Condition A41 of this approval must include the time and date of the incident, details of the incident and must identify any non-compliance with this approval.

During Construction

C2S SSI 15_7400 COA – A42

Environment Manager

CEMP

Any requirements of the Secretary or Relevant Public Authority (as determined by the Secretary) to address the cause or impact of an incident reported in accordance with Condition A41 of this approval, must be met within the timeframe determined by the Secretary or relevant public authority.

During Construction

C2S SSI 15_7400 COA – A43

Environment Manager

CEMP




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If statutory notification is given to the EPA as required under the POEO Act in relation to the CSSI, such notification must also be provided to the Secretary for information within 24 hours after the notification was given to the EPA.

During Construction

C2S SSI 15_7400 COA – A44

Environment Manager

CEMP

The following CEMP sub-plans must be prepared in consultation with the relevant government agencies identified for each CEMP sub-plan and be consistent with the CEMF and CEMP referred to in Condition C1. The Construction Traffic Management Plan must also be prepared in accordance with the Construction Traffic Management Framework as required by Condition E81.

Required CEMP sub- plan Relevant government agencies to be consulted for each CEMP sub-plan

(a) Noise and vibration Relevant Council(s)

(b) Biodiversity OEH and Relevant Council(s)

(c) Air quality N/A

(d) Soil and Water DPI Water, Relevant Council(s), OEH, SES, NSW Fire and Rescue

(e) Groundwater DPI Water


C2S SSI 15_7400 COA – C3

Environment Manager

Appendix B

The CEMP sub-plans must state how: the environmental performance outcomes identified in the EIS as amended by the documents listed in A1 will be achieved; the mitigation measures identified in the EIS as amended by documents listed in A1 will be implemented; the relevant terms of this approval will be complied with; and issues requiring management during construction, as identified through ongoing environmental risk analysis, will be managed.

During Construction

C2S SSI 15_7400 COA – C4

Environment Manager

Section 6

The CEMP sub-plans must be developed in consultation with relevant government agencies. Where an agency(ies) request(s) is not included, the Proponent must provide the Secretary justification as to why. Details of all information requested by an agency to be included in a CEMP sub plan as a result of consultation and copies of all correspondence from those agencies must be provided with the relevant CEMP sub-plan.


C2S SSI 15_7400 COA – C5

Environment Manager

Appendix B

Any of the CEMP sub-plans may be submitted to the Secretary along with, or subsequent to, the submission of the CEMP but in any event, no later than one (1) month before commencement of construction.


C2S SSI 15_7400 COA – C6

Environment Manager

Section 10 and CEMP




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The CEMP must be endorsed by the ER and then submitted to the Secretary for approval no later than one (1) month before the commencement of construction or within another timeframe agreed with the Secretary.


C2S SSI 15_7400 COA – C7

Environment Manager

Section 10 and CEMP

Construction must not commence until the CEMP and all CEMP sub-plans have been approved by the Secretary. The CEMP and CEMP sub-plans, as approved by the Secretary, including any minor amendments approved by the ER (or AA in regards to the Noise and Vibration sub-plan), must be implemented for the duration of construction. Where the CSSI is being staged, construction of that stage is not to commence until the relevant CEMP and sub-plans have been approved by the Secretary.


C2S SSI 15_7400 COA – C8

Environment Manager

Section 10 and CEMP

The following Construction Monitoring Programs must be prepared in consultation with the relevant government agencies identified for each Construction Monitoring Program to compare actual performance of construction of the CSSI against predicted performance.

Required Construction Monitoring Programs Relevant government agencies to be consulted for each Construction Monitoring Program

(a) Noise and Vibration EPA and Relevant Council(s)

(b) Blasting EPA and Relevant Council(s)

(c) Water Quality EPA and Relevant Council(s)

(d) Groundwater DPI Water


C2S SSI 15_7400 COA – C9

Environment Manager

Section 7

Appendix B

Each Construction Monitoring Program must provide:

(a) details of baseline data available;

(b) details of baseline data to be obtained and when;

(c) details of all monitoring of the project to be undertaken;

(d) the parameters of the project to be monitored;

(e) the frequency of monitoring to be undertaken;

(f) the location of monitoring;

(g) the reporting of monitoring results;

(h) procedures to identify and implement additional mitigation measures where results of monitoring are unsatisfactory; and

(i) any consultation to be undertaken in relation to the monitoring programs.

During Construction

C2S SSI 15_7400 COA – C10

Environment Manager

Section 7




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The Construction Monitoring Programs must be developed in consultation with relevant government agencies as identified in Condition C9 of this approval and must include, to the written satisfaction of the Secretary, information requested by an agency to be included in a Construction Monitoring Programs during such consultation. Details of all information requested by an agency including copies of all correspondence from those agencies, must be provided with the relevant Construction Monitoring Program.

During Construction

C2S SSI 15_7400 COA – C12

Environment Manager

Section 7 Appendix B

The Construction Monitoring Programs must be endorsed by the ER (or AA in regards to the Noise and Vibration Construction Monitoring Program) and then submitted to the Secretary for approval at least one (1) month before commencement of construction or within another timeframe agreed with the Secretary.

During Construction

C2S SSI 15_7400 COA – C13

Environment Manager

Section 7

Construction must not commence until the Secretary has approved all of the required Construction Monitoring Programs, and all relevant baseline data for the specific construction activity has been collected.

During Construction

C2S SSI 15_7400 COA – C14

Environment Manager

Section 7

The Construction Monitoring Programs, as approved by the Secretary including any minor amendments approved by the ER (or AA in regards to the Noise and Vibration Construction Monitoring Program), must be implemented for the duration of construction and for any longer period set out in the monitoring program or specified by the Secretary, whichever is the greater.

During Construction

C2S SSI 15_7400 COA – C15

Environment Manager

CEMP

The results of the Construction Monitoring Programs must be submitted to the Secretary for information, and relevant regulatory agencies, for information in the form of a Construction Monitoring Report at the frequency identified in the relevant Construction Monitoring Program.

During Construction

C2S SSI 15_7400 COA – C16

Environment Manager

Section 7

Where a relevant CEMP sub-plan exists, the relevant Construction Monitoring Program may be incorporated into that CEMP sub-plan.

During Construction

C2S SSI 15_7400 COA – C17

Environment Manager

Section 7

Measures identified in Chapter 11 of the PIR to maintain or improve flood characteristics, as amended by the documents listed in A1, must be incorporated into the detailed design of the CSSI. The incorporation of these measures into the detailed design, including modelling, must be reviewed and endorsed by a suitably qualified and experienced person in consultation with directly affected landowners and businesses, Sydney Water, DPI Water, OEH, NSW State Emergency Service (SES) and Relevant Councils.

During Construction

C2S SSI 15_7400 COA – E8

Environment Manager

Section 4.11




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Flood information including flood reports, models and geographic information system outputs, and work as executed information from a registered surveyor certifying finished ground levels and the dimensions and finished levels of all structures within the flood prone land, must be provided to the relevant Councils, Sydney Water, OEH and the SES. The Relevant Councils, Sydney Water, OEH and the SES must be notified in writing that the information is available no later than one month following the completion of construction and be provided with that information. Information requested by the relevant Council, Sydney Water, OEH or the SES must be provided no later than six months following the completion of construction or within another timeframe agreed with the Relevant Council(s), Sydney Water, OEH and the SES.

During Construction

C2S SSI 15_7400 COA – E9

Environment Manager

Section 4.9

All reasonably practicable erosion and sediment controls must be installed and appropriately maintained to minimise any water pollution. When implementing such controls, any relevant guidance in the Managing Urban Stormwater Series must be considered.

During Construction

C2S SSI 15_7400 COA – E65

Environment Manager

Project Engineer

Site Superintendent

Section 6.1

A Site Contamination Report, documenting the outcomes of Phase 1 and Phase 2 contamination assessments of land upon which the CSSI is to be carried out, that is suspected to be, or known to be, contaminated must be prepared by a suitably qualified and experienced person in accordance with guidelines made or approved under the Contaminated Land Management Act 1997 (NSW).

During Construction

C2S SSI 15_7400 COA – E66

TfNSW Section 6.5

If a Site Contamination Report prepared under Condition E66 finds such land contains contamination, a site audit is required to determine the suitability of a site for a specified use. If a site audit is required, a Site Audit Statement and Site Audit Report must be prepared by a NSW EPA Accredited Site Auditor. Contaminated land must not be used for the purpose approved under the terms of this approval until a Site Audit Statement is obtained that declares the land is suitable for that purpose and any conditions on the Site Audit Statement have been complied with.

During Construction

C2S SSI 15_7400 COA – E67

Environment Manager

Section 6.5

A copy of the Site Audit Statement and Site Audit Report must be submitted to the Secretary and Council for information no later than one (1) month before the commencement of operation.

During Construction

C2S SSI 15_7400 COA – E68

Environment Manager

Section 6.5




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An Unexpected Contaminated Land and Asbestos Finds Procedure must be prepared and must be followed should unexpected contaminated land or asbestos be excavated or otherwise discovered during construction.

During Construction

C2S SSI 15_7400 COA – E69

Environment Manager

Project Engineer

Site Superintendent

Section 6.8

The Unexpected Contaminated Land and Asbestos Finds Procedure must be implemented throughout construction.

During Construction

C2S SSI 15_7400 COA – E70

Environment Manager

Project Engineer

Site Superintendent

Section 6.8

The CSSI must be constructed and operated so as to maintain the NSW Water Quality Objectives where they are being achieved as at the date of this approval, and contribute towards achievement of the NSW Water Quality Objectives over time where they are not being achieved as at the date of this approval, unless an EPL in force in respect of the CSSI contains different requirements in relation to the NSW Water Quality Objectives, in which case those requirements must be complied with.

During Construction

C2S SSI 15_7400 COA – E107

Environment Manager

Project Engineer

Site Superintendent

Section 6.2.3

Drainage feature crossings (permanent and temporary watercourse crossings and stream diversions) and drainage swales and depressions must be undertaken in accordance with relevant guidelines and designed by a suitably qualified and experienced person.

C2S SSI 15_7400 COA – E108

Not applicable

EIS Environmental Management Measures

Updated desktop contamination assessments would be carried out for Chatswood dive site, Victoria Cross Station, Artarmon substation, Blues Point temporary site, Barangaroo Station, Central Station and Waterloo Station and the Sydenham Maintenance Centre site within surface track works south. If sufficient information is not available to determine the remediation requirements and the impact on potential receivers, then detailed contamination assessments, including collection and analysis of soil and groundwater samples would be carried out.

Detailed contamination assessment would also be carried out for the Barangaroo power supply route within Hickson Road and the Marrickville power supply route adjacent to Sydney Park and Camdenville Oval.

During Construction

C2S EIS REMM – SCW1

Environment Manager

Project Engineer

Site Superintendent

Section 6.5




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In the event a Remediation Action Plan is required, these would be developed in accordance with Managing Land Contamination: Planning Guidelines SEPP 55 – Remediation of Land (Department of Urban Affairs and Planning and Environment Protection Authority, 1998) and a site auditor would be engaged

Erosion and sediment control measures would be implemented in accordance with Managing Urban Stormwater: Soils and Construction Volume 1 (Landcom, 2004) and Managing Urban Stormwater: Soils and Construction Volume 2 (Department of Environment and Climate Change, 2008a). Measures would be designed as a minimum for the 80th percentile; 5-day rainfall event.

During Construction


Site Superintendent

Section 6.1

Discharges from the construction water treatment plants would be monitored to ensure compliance with the discharge criteria in an environment protection licence issued to the project.

During Construction


Environment Manager

Project Engineer

Section 6.2

All hazardous substances that may be required for construction would be stored and managed in accordance with the Storage and Handling of Dangerous Goods Code of Practice (WorkCover NSW, 2005) and Hazardous and Offensive Development Application Guidelines: Applying SEPP 33 (Department of Planning, 2011).

During Construction

C2S EIS REMM – HR1

Environment Manager

Project Engineer

Site Superintendent

Section 6

Dial before you dig searches and non-destructive digging would be carried out to identify the presence of underground utilities.

During Construction


Environment Manager

Project Engineer

Section 6

A hazardous material survey would be completed for those buildings and structures suspected of containing hazardous materials (particularly asbestos) prior to their demolition. If asbestos is encountered, it would be handled and managed in accordance with relevant legislation, codes of practice and Australian standards.

During Construction


Environment Manager

Project Engineer

Construction Demolition Management sub-plan

100 per cent of spoil that can be reused would be beneficially reused in accordance with the project spoil reuse hierarchy.

During Construction

C2S EIS REMM – WM2

Environment Manager

Project Engineer

Construction Waste Management sub-plan and Construction Spoil




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Management sub-plan

EIS Environmental Performance Outcomes

Soils, Contamination and Water quality

• Erosion and sediment controls during construction would be implemented in accordance with Managing Urban Stormwater: Soils and Construction Volume 1 (Landcom, 2004) and Managing Urban Stormwater: Soils and Construction Volume 2 (Department of Environment and Climate Change, 2008a)

• There would be no impacts on aquatic environments associated with the disturbance of acid sulfate soils during construction

• Any contamination on project sites would be remediated to suit future land use

• The project would protect or contribute to achieving the Water Quality Objectives, during construction and operation

• Construction water quality discharge would comply with the requirements of an environment protection licence issued to the project

• Operation water quality discharge would comply with a discharge criteria determined in consultation with the NSW Environment Protection Authority.

During Construction

C2S EIS EPO – Soils, contamination and water quality

Environment Manager

Project Engineer

Section 6

Flooding and hydrology

• Changes to overland flow diversions during construction would meet the following criteria:

• Not worsen existing flooding characteristics up to and including the 100 year annual recurrence interval event in the vicinity of the project (not worsen is defined as a maximum increase flood levels of 50mm in a 100 year Average Recurrence lnterval flood event, a maximum increase in time of inundation of one hour in a 100 year Average Recurrence lnterval flood event, and no increase in the potential for soil erosion and scouring from any increase in flow velocity in a 100 year Average Recurrence lnterval flood event).

• Dedicated evacuation routes would not be adversely impacted in flood events up to and including the probable maximum flood

During Construction

C2S EIS EPO – Soils, contamination and water quality

Environment Manager

Project Engineer

Section 4.9




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• There would be no additional private properties affected by flooding up to and including the 100 year average recurrence interval event during operation

• The performance of the downstream drainage network would be maintained during operation.

Construction Environmental Management Framework

Construction Environmental Management Sub-Plans Prior to construction

CEMF Section 3.4 Environment Manager

Project Engineer

Site Superintendent

CEMP and associated sub-plans, including this plan

Additional Environmental Assessments Prior to construction


Project Engineer

Site Superintendent

CEMP

Register of Hold Points Prior to construction


Project Engineer

Site Superintendent

Section 6.2

Environmental Monitoring, Inspections and Auditing Prior to construction


Project Engineer

Site Superintendent

Section 9

Environmental non-compliances Prior to construction


Section 9




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Project Engineer

Site Superintendent

Environmental Records and Compliance Reporting Prior to construction


Project Engineer

Site Superintendent

CEMP

Review and Improvement of the E&SMS Prior to construction


Project Engineer

Site Superintendent

CEMP

Soil and Water Management Objectives

(a) The following soil and water management objectives will apply to construction:

• Minimise pollution of surface water through appropriate erosion and sediment control.

• Maintain existing water quality of surrounding surface watercourses.

• Source construction water from non-potable sources, where feasible and reasonable.

During Construction


Project Engineer

Site Superintendent

Section 1.7

Soil and Water Implementation

(a) Principal Contractors will develop and implement a Soil and Water Management Plan for their scope of works. The Soil and Water Management Plan will include as a minimum:

• The surface water and flooding mitigation measures as detailed in the environmental approval documentation.

• details of construction activities and their locations, which have the potential to impact on water courses, storage facilities, stormwater flows, and groundwater;

During Construction

CEMF Section 15.2a)

Environment Manager

Project Engineer

Site Superintendent

This Plan




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• surface water and ground water impact assessment criteria consistent with the principles of the Australian and New Zealand Environment Conservation Council (ANZECC) guidelines;

• management measures to be used to minimise surface and groundwater impacts, including identification of water treatment measures and discharge points, details of how spoil and fill material required by the SSI will be sourced, handled, stockpiled, reused and managed;

• erosion and sediment control measures; salinity control measures and the consideration of flood events;

• a contingency plan, consistent with the Acid Sulphate Soils Manual (EPA 1998), to deal with the unexpected discovery of actual or potential acid sulphate soils, including procedures for the investigation, handling, treatment and management of such soils and water seepage;

• management measures for contaminated material (soils, water and building materials) and a contingency plan to be implemented in the case of unanticipated discovery of contaminated material, including asbestos, during construction;

• a description of how the effectiveness of these actions and measures would be monitored during the proposed works, clearly indicating how often this monitoring would be undertaken, the locations where monitoring would take place, how the results of the monitoring would be recorded and reported, and, if any exceedance of the criteria is detected how any noncompliance can be rectified;

• The requirements of any applicable EPL conditions.

• The responsibilities of key project personnel with respect to the implementation of the plan.

• Procedures for the development and implementation of progressive erosion and sediment control plans.

• Identification of locations where site specific Stormwater and Flooding Management Plans are required.

• Compliance record generation and management.

Principal Contractors will develop and implement progressive erosion and sediment control plans (ESCPs) for all active worksites in accordance with Managing Urban Stormwater: Soils & Construction Volume 1 (Landcom, 2004) (known as the “Blue Book”). The ESCPs

During Construction

CEMF Section 15.2b)

Environment Manager

Noted – Standalone




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will be approved by the Contractor’s Environmental Manager (or delegate) prior to any works commencing (including vegetation clearing) on a particular site. Copies of the approved ESCP will be held by the relevant Contractor personnel including the Engineer and the Site Foreman.

Project Engineer

Site Superintendent

plans to be developed

ESCPs will detail all required erosion and sediment control measures for the particular site at the particular point in time and be progressively updated to reflect the current site conditions.

Any amendments to the ESCP will be approved by the Contractor’s Environmental Manager (or delegate).

During Construction

CEMF Section 15.2c)

Environment Manager

Project Engineer

Site Superintendent

Noted

Principal Contractors will develop and implement Stormwater and Flooding Management Plans for the relevant construction sites. These plans will identify the appropriate design standard for flood mitigation based on the duration of construction, proposed activities and flood risks.

The plan will develop procedures to ensure that threats to human safety and damage to infrastructure are not exacerbated during the construction period.

During Construction

CEMF Section 15.2d)

Environment Manager

Project Engineer

Site Superintendent

Section 4.9

Principal Contractors will undertake the following soil and water monitoring as a minimum:

• Weekly inspections of the erosion and sediment control measures. Issues identified would be rectified as soon as practicable.

• Additional inspections will be undertaken following significant rainfall events (greater than 20 mm in 24 hours).

• All water will be tested (and treated if required) prior to discharge from the site in order to determine compliance with the parameters of the EPL. No water will be discharged from the site without written approval of the Contractor’s Environmental Manager (or delegate).

This is to form a HOLD POINT.

During Construction

CEMF Section 15.2e)

Environment Manager

Project Engineer

Site Superintendent

Section 6

Section 7

The following compliance records will be kept by the Principal Contractors:

• Copies of current ESCPs for all active construction sites.

• Records of soil and water inspections undertaken.

• Records of testing of any water prior to discharge.

During Construction

CEMF Section 15.2f)

Environment Manager

Project Engineer

Site Superintendent

Section 9




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• Records of the release of the hold point to discharge water from the construction site to the receiving environment.

The following water resources management objectives will apply to the construction of

the project:

• Minimise demand for, and use of potable water.

• Maximise opportunities for water re-use from captured stormwater, wastewater and groundwater.

• Examples of measures to minimise potable water consumption include:

- Water efficient controls, fixtures and fittings in temporary facilities.

- Collecting, treating and reusing water generated in tunnelling operations, concrete batching and casting facility processes.

- Using recycled water or treated water from onsite sources in the formulation of concrete.

- Harvesting and reusing rainwater from roofs of temporary facilities.

- Using water from recycled water networks.

- Collecting, treating and reusing groundwater and stormwater.

- Using water efficient construction methods and equipment.

- Providing designated sealed areas for equipment wash down.

During Construction

CEMF Section 15.2g)

Environment Manager

Project Engineer

Site Superintendent

Section 6

Soil and Water Mitigation

(a) Examples of surface water and flooding mitigation measures include:

• Clean water will be diverted around disturbed site areas, stockpiles and contaminated areas.

• Control measures will be installed downstream of works, stockpiles and other disturbed areas.

• Exposed surfaces will be minimised, and stabilised / revegetated as soon feasible and reasonable upon completion of construction.

• Dangerous good and hazardous materials storage will be within bunded areas with a capacity of 110 per cent of the maximum single stored volume.

• Spill kits will be provided at the batch plants, storage areas and main work sites.

During Construction

CEMF Section 15.3) Environment Manager

Project Engineer

Site Superintendent

Section 6




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Applicable EPL 21148 Conditions to the CSWMP

Measure Timing Requirement Reference

The following points referred to in the table are identified in this licence for the purposes of the monitoring and/or the setting of limits for discharges of pollutants to water from the point.

Discharge of water treatment plant to stormwater system – Sydney Trains Yard (Easting: 333891, Northing: 6248995, MGA56, GDA94 - Refer Discharge Point Map on EPA Electronic File EF18/31724).

During Construction EPL 21148 P1.1 S6.1.4

Except as may be expressly provided in any other condition of this licence, the licensee must comply with section 120 of the Protection of the Environment Operations Act 1997.

During Construction EPL 21148 L1.1 Table 1

For each monitoring/discharge point or utilisation area specified in the table\s below (by a point number), the concentration of a pollutant discharged at that point, or applied to that area, must not exceed the concentration limits specified for that pollutant in the table.

During Construction EPL 21148 L2.1 S6.1.4

Where a pH quality limit is specified in the table, the specified percentage of samples must be within the specified ranges.

During Construction EPL 21148 L2.2 S4.8

To avoid any doubt, this condition does not authorise the pollution of waters by any pollutant other than those specified in the table\s.

During Construction EPL 21148 L2.3 S4.8 and throughout this document

Water and/or Land Concentration Limits

Oil and grease- not visible

pH 6.5-8.5

Total Suspended Solids (mg/L) 50

During Construction EPL 21148 L2.4 S4.8

If the licensee uses turbidity (NTU) in place of TSS to determine compliance with Conditions L2.1 and L2.4 the licensee must develop a statistical correlation which identifies the relationship between NTU and TSS for water quality in the sediment basins, water treatment plants and excavations in order to determine the NTU equivalent of 50 mg/L TSS before NTU is used.

During Construction EPL 21148 L2.5 Noted

The licensee must provide the EPA with a copy of the statistical assessment methodology and results before using NTU in place of TSS.


The licensee must develop and implement a method to enable the ongoing verification of the relationship between NTU and TSS.


The licensee must provide the EPA with any amendments the licensee makes to the statistical correlation as a result of the ongoing verification required by Condition L2.7 before using the revised statistical correlation.


The licensee must minimise the emission of dust from the premises to the greatest extent practicable. During Construction EPL 21148 O3.1 Table 3




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Erosion and sediment control

All feasible and reasonable erosion and sediment controls are to be implemented to minimise sediment (including dust) leaving the premises and are to be implemented before any soil disturbance or vegetation clearing commences.

During Construction EPL 21148 O5.1 S6.1.4

All erosion and sediment controls at the premises must be maintained until all disturbed areas are stabilised. During Construction EPL 21148 O5.2 S4.8, S6.1.4

The erosion and sediment controls to be implemented are to include but not be limited to:

a) minimising the area of exposed soil as much as practicable, including stabilising disturbed areas as soon as practicable; and

b) diversion of run-off from land upslope of the premises or undisturbed portions of the premises away from areas of soil disturbance as much as practicable; and

c) diversion of run-off from areas of exposed soil to appropriate sediment control devices as much as practicable; and

d) installing erosion controls in the base of drains used to divert runoff, to minimise erosion of sediment from the drain

During Construction EPL 21148 O5.3 S4.8, S6.1.4

Erosion and sediment controls are to be selected, installed and maintained taking into consideration the guidance in "Managing Urban Stormwater – Soils and Construction, Volume 2D, Main road construction" (DECC 2008) and "Managing urban stormwater: soils and construction – Volume 1" (Landcom 2006).


The licensee must inspect the operation of all erosion and sediment controls installed on the premises and undertake any works required to repair and/or maintain these controls:

a) at least weekly;

b) daily during periods of rainfall that causes runoff to occur; and

c) prior to any site closure of greater than 24 hours.


The licensee is required to prepare an erosion and sediment control strategy document. The licensee must ensure that:

a) The document describes all erosion and sediment controls (including those relating to the minimisation of mud tracking from the premises) to be implemented at the site; and

b) The document is prepared before the controls are implemented; and

c) A copy of the document is kept at the premises until the licences is surrendered; and

d) The document includes an assessment of how the reasonable and feasible erosion and sediment controls (including those relating to the minimisation of mud tracking from the premises) were selected; and





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e) The document is updated prior to any changes to the erosion and sediment controls.

The licensee must record all inspections of erosion and sediment controls, including observations on the condition of the controls, and works undertaken to repair and/or maintain the controls. These records are to be kept on the premises.


All stockpiled material must be stabilised as soon as practicable if the stockpile has been left in-situ for greater than 5 days.


A water quality sampling point is to be located at the water discharge point/'s identified in condition P1.1 and a safe access path is to be provided to the sampling point to readily allow for the collection of samples.


The results of any monitoring required to be conducted by this licence or a load calculation protocol must be recorded and retained as set out in this condition.

During Construction EPL 21148 M1.1 S4.8, S6.1.4

All records required to be kept by this licence must be:

a) in a legible form, or in a form that can readily be reduced to a legible form;

b) kept for at least 4 years after the monitoring or event to which they relate took place; and

c) produced in a legible form to any authorised officer of the EPA who asks to see them.


The following records must be kept in respect of any samples required to be collected for the purposes of this licence:

a) the date(s) on which the sample was taken;

b) the time(s) at which the sample was collected;

c) the point at which the sample was taken; and

d) the name of the person who collected the sample.


For each monitoring/discharge point or utilisation area specified below (by a point number), the licensee must monitor (by sampling and obtaining results by analysis) the concentration of each pollutant specified in Column 1. The licensee must use the sampling method, units of measure, and sample at the frequency, specified opposite in the other columns:





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Water and / or Land Monitoring Requirements

POINT 1


Oil and Grease Visible Special Frequency 1 Visual Inspection

pH pH Special Frequency 2 In situ

Total suspended solids milligrams per litre Special Frequency 3 Grab sample

POINT 2


Oil and Grease Visible Special Frequency 1 Visual Inspection

pH pH Special Frequency 2 In situ

Total suspended solids milligrams per litre Special Frequency 3 Grab sample


For the purposes of Conditions M2.1, the term ‘Special Frequency 1’ means:

a) Less than 24hours prior to controlled discharge and daily for any controlled discharge.





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Appendix B – Government Stakeholder Correspondence

Document Ref Department of Primary Industries - Water (Natural Resources Regulator)

comment details

Response and follow up actions (if required)

CSWMP No comments were made in relation to the Construction Soil and Water Management Plan Refer to the Construction Groundwater Management Plan

Document Ref City of Sydney comment details Response and follow up actions (if required)

Section 1.7 Under the section of legislation, Sydney Metro should also assess the development under the “NSW State Government’s Flood Prone Lands Policy” as outlined in the “NSW State Governments 2005 Floodplain Development Manual”. Accordingly, the development should be designed in accordance with flood compatibility.

The CSMW would be designed in accordance with all applicable standards, policies and guidelines.

Document Ref Office of Environment and Heritage / EPA

comment details

Response and follow up actions (if required)

CSWMP The EPA encourages the development of such plans to ensure that proponents have determined how they will meet their statutory obligations and designated environmental objectives. However, it is not EPA policy to approve or endorse these documents. The EPA’s role is to set environmental objectives/requirements for environmental management, rather than being directly involved in the development of strategies to achieve those objectives/requirements.

Noted.

CSWMP Please be advised that there are no outstanding Flood risk management issues that have not been adequately addressed in the report. It is agreed that a Stormwater and Flooding Management Plan is not required.”

No follow up response required.




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Document Ref NSW State Emergency Service

comment details

Response

CSWMP The stormwater and flood mitigation plan once developed (if required) will be more relevant to the NSW SES and we look forward to hearing more about this document.

A Stormwater and Flood Mitigation Plan is not required

Document Ref NSW Fire and Rescue Service

comment details

Response

CSWMP No comments or concerns Noted



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Appendix C – Unexpected Finds Procedure

Unexpected finds may include suspicious materials (e.g. ground staining), odour (e.g. hydrocarbon odours), asbestos, and contaminated Soil.

If you identify or suspect unexpected finds in the area, you must:

Cease work in the area of concern immediately;

Move away from immediate area and alert your supervisor.

Isolate the area with barrier tape or any other physical barrier to prevent workers from entering the potentially contaminated location;

Supervisor will report to and consult with the WHS Manager and/or the Environment Manager immediately; and

Notify nearby work groups of the hazard.

DO NOT return to the area unless advised by the WHS Manager, Occupational Hygienist or the Environmental Manager that it is safe and appropriate to do so.

The WHS Manager and/or the Environment Manager will investigate the suspected find and coordinate the following:

The WHS Manager will contact the Occupational Hygienist who will attend site and tests the suspected material and advise what actions should be taken.

The Environment Manager will engage a suitably qualified consultant (environmental, Heritage, etc.) to inspect the site and carry out an initial assessment of the nature and extent of the unexpected find;

The Hygienist/environmental consultant will further investigate and determine appropriate actions (e.g. additional PPE, exclusion zone, work practices, testing etc. in accordance with legislation, relevant project management plans and the relevant contamination report.

In addition to the above, remediation plans will be developed to allow for the management and remediation of unexpected finds. Contingency plans will consider issues such as:

Managing unexpected finds in the safest and most time saving method;

Potential soil and/or groundwater contamination as a result of the unexpected find;

Management of potential contamination that may give rise to odours, vapours or other health or aesthetic issues during construction and operation of the project and its surrounds; and

Possible human health, environmental and aesthetic impacts of all contamination.

Definitive procedures for treatment and removal.

Asbestos Finds

Identified fragments of suspected Asbestos Containing Materials (ACM) on the surface and within miscellaneous stockpiles on site will be managed in accordance with the WHS Management Plan and a task specific Asbestos Removal Control Plan.

For Non-Friable asbestos finds less than 10M2, trained and competent Asbestos personnel will collect, bag and store the asbestos for removal by our licensed asbestos removal contractor.

Removal of any Friable or any sections of asbestos over 10M2 will be carried out by a licensed asbestos removal contractor who will produce the following:



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An asbestos removal licence application for the type of asbestos to be removed Class a or Class B;

An asbestos removal control plan;

Asbestos removal licences for workers performing the removal works;

Provision of an Asbestos Removal Supervisor;

A Laing O’Rourke Asbestos Removal Permit must be prepared and approved;

A task specific SWMS;

Evidence of notification to the relevant authority and asbestos removal permit;

Where there is uncertainty as to whether the exposure standard may be exceeded, or if it is likely to be exceeded, then air monitoring must be performed by a competent person who is independent of the removalist;

At the completion of the removal works a clearance certificate must be obtained from a competent person (Licensed Asbestos Assessor);

A waste disposal certificate must be provided by the removalist following the completion of the works to prove that any asbestos containing material removed from the site has gone to an approved landfill facility; and

Unless a specific exemption exists, asbestos waste will be tracked using the NSW EPA’s Waste Locate. Evidence of this is to be provided by the asbestos removalist.



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Appendix D – SER’s addressed in this Management Plan

SER Critical Control

Control Description Location addressed

SER 3 – Water Quality and Wastewater Storage

CC 01 Bunded storage areas in place for all fuels, chemicals and oils (minimum 110% of the stored capacity) including external bunded storage for generators with fuel storage capacity of greater than 100 litres

Section 6.4


CC 02 All generators have internal bunds. External bunded storage provided for generators and fuel storage systems that are stored over or within 20 metres of waterways.

Section 6.4


CC 03 All generator systems with external fuel storage are bunded and installed and commissioned by competent personnel

Section 6.4


CC 04 Stormwater that collects in basins, excavations and drainage systems is treated and tested prior to discharge in accordance with the legislated requirements, license or approval requirements

Section 6.4


CC 05 Plant and equipment operating over water has external protection for hydraulic and fuel lines. Barges also have installed controls to prevent surface runoff into waterways.

No work above water at CSM.


CC 06 Concrete and kibble washout areas are installed and maintained to ensure no impact to surface or groundwater

Section 6.1.4


CC 07 Mulch stockpile sites are located on elevated ground within the work footprint, away from water and creek lines, and at least 20 metres from a watercourse

No mulch stockpiles kept on site.


CC 08 Full circumference bunds greater than 300mm high are installed for all mulch/cleared vegetation material stockpiled for longer than one month. Temporary mulch / cleared vegetation stockpile bunds are provided with a stabilised temporary spillway to prevent damage during major rainfall events.

No mulch stockpiles kept on site


CC 09 A sump is constructed downstream of the mulch bund to contain runoff from the design rainfall event

No mulch stockpiles kept on site


CC 10 Telemetry and shutoff systems implemented for all critical pump lines and those that operate out of hours

WTP only

Section 6.2.1


CC 11 Wastewater storage systems are located above the 1 in 20 Average Recurrence Interval (ARI) flood level (note: project conditions may impose a higher level)

Central Station not located within flood hazard area as per City of Sydney LEP.

Section 4.11


CC 12 Water inflow systems and pumps have automatic shut-off valves to prevent wastewater storage capacity being exceeded

Discharging wastewater to sewer.



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CC 13 High-level alarms, including visual and aural warnings, are in place and operational. High-level alarms are triggered when the capacity exceeds 75% (note: this does not apply to portable toilets)



CC 14 Weekly inspection regime for the wastewater storage facility including capacity assessment has been completed. Tank capacity is a minimum of 80 litres per person.


SER 4 – Erosion and Sediment Control

CC 01 Water diversion drains are in place to prevent clean water entering the site from upstream/offsite areas

Section 6.1


CC 02 Sediment basins are the required size and have stabilised emergency spillways (note: design criteria for spillways is 20-year average recurrence interval event)

Sediment basins not required.

Section 6.1.3


CC 03 Sediment basins have provision for identifying the level of accumulated sediment within the basin and water level


Section 6.1.3


CC 04 Sediment basins are treated using approved flocculants and discharged with 5 days of the cessation of rain


Section 6.1.3


CC 05 Temporary drains are in place to divert construction run-off to sediment basins and have been designed to convey the design rainfall event. This is typically the 1 in 10 year, critical time of concentration rainfall event.

Temporary drains not

Section 6.1


CC 06 There are no areas where run-off from disturbed areas can leave the site without sediment controls

Section 6.1


CC 07 Temporary erosion controls are provided for areas disturbed by the project within waterways

No waterways within site.


CC 08 Sediment controls are maintained and have a minimum of 70% sediment storage capacity

Section 6.1


CC 09 Wheel wash/shaker grid and hardstand are installed at site exits to prevent tracking sediment onto roadways. Roadways are clear of tracked sediment.

Wheel wash not required. Roads kept clean with sweeper truck

Section 6.1


CC 10 Stormwater pits that receive site runoff and all stockpile areas have functioning sediment controls in place. Erosion control provided for long term stockpiles.

Section 6.1.4


CC 11 Stockpiles are located away from any concentrated overland flows, and located outside of flood prone areas (i.e. above the 20-year average return interval flood event limit)

Stockpiles away from concentrated flows


CC 12 Sediment basins are sized in accordance with the requirements of the blue book, Best Practice ESC (IECA 2008) guidelines, the environmental licence and the relevant conditions of approval


Section 6.1.3



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SER 6 – Piling CC 01 Lime is stored correctly in an appropriate container to prevent mobilisation of lime into waterways or dust generation

Section 6.4

SER 6 – Piling CC 02 Hook lift bins or suitable equivalent are used to retain pile spoil and monitored frequently to assess capacity and identify potential over filling. Contamination of the piling pad is to be prevented at all times.

Spoil transferred from work area to stockpiles as per Construction Work Method Statement

SER 6 – Piling CC 03 Acid Sulfate Treatment Areas are located outside of flood prone areas, more than 50m from waterways and in line with the Construction Acid Sulfate Materials Management Plan

Not required

Section 4.6 and 6.7

SER 6 – Piling CC 04 Acid Sulphate Treatment Areas are maintained and monitored effectively to ensure no breaches of the treatment area, unauthorised Acid Sulphate Material, sediment or acidic runoff is discharged to waterways

Not required

Section 4.6 and 6.7

SER 6 – Piling CC 05

Polymer products used in piling works are prevented from entering waterways and disposed of correctly to prevent impacts on surrounding environment

Polymer products not used on site.


Biodegradable oil use is to be used in plant and equipment for works over waterways

No working over water ways in CSM


Hydraulic hoses are reviewed/inspected for wear and damage prior to the commencement of works. Damaged hoses are replaced. Sheathing is provided for exposed hydraulic and fuel lines.

A pre-mobilisation check is made for all equipment coming on site.


Spill kits are located close to the piling works and maintained to ensure they are fully stocked.

Refer ECM Section 6.4

SER 6 - Piling CC 09

Hydrocarbon absorbent booms are provided in the waterway to prevent the spread of spills

No waterways within project.

Suite 2.06, Level 2 29-31 Solent Circuit Baulkham Hills NSW 2153 Tel: 61 (02) 9659 5433 e-mail: [email protected] Web: www.hbi.com.au

Leaders in Environmental Consulting

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HBI Healthy Buildings International Pty Ltd A.C.N. 003 270 693 A.B.N. 39 003 270 693

Hugh Chapman 19 October 2020 Associate Director Environment Environment Sustainability and Planning Sydney Metro Transport for NSW PO Box K659 HAYMARKET NSW 1240 Ref: CSMW SWMP Rev8 Dear Stuart

RE: Sydney Metro City & Southwest- Central Station Main Works (CSMW) –

Construction Soil and Water Management Plan Thank you for providing the following documents for Environmental Representative (ER) review and endorsement as required by the Condition of Approval A24 (d) and (j) of the Sydney Metro City & Southwest project (SSI – 15_7400 January 9 2017).

Sydney Metro City & Southwest- Central Station Main Works – Construction Soil and Water Management Plan, SMCSWCSM-LORSMC-EM-PLN-000002 Revision 08, 19 October 2020 (the Plan).

The Plan was developed to address the Condition C3(d) of the Project Approval. Revision 08 of the Plan is the outcome of an LOR annual revision of through:

a) Updating the status of works to be consistent with current activities such as including details of the CSR works.

b) Including details of recent Modifications to the Infrastructure Approval c) Updating the details regarding Contamination investigations; RAPs and observed

gasworks contamination d) Including details regarding the recently installed water treatment plant and water

quality objectives for discharge waters e) Updates to LOR Severe Environmental Risks

As an approved ER for the Sydney Metro City & Southwest project, I have reviewed and provided comments on this document. I approve the revised Plan for implementation. Yours sincerely

Michael Woolley Environmental Representative – Sydney Metro – City and South West

mailto:[email protected]

csmw soil and water management plan

Documents