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Groundwater Abstraction Environmental Management Plan

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Groundwater Abstraction Environmental Management Plan Groundwater Abstraction Environmental Management Plan Thornlie-Cockburn Link For more information contact Public Transport Authority Public Transport Centre, West Parade, Perth WA 6000 PO Box 8125, Perth Business Centre, Perth WA 6849 Telephone: (08) 9326 2000 Email: [email protected] www.pta.wa.gov.au Public Transport Authority Groundwater Abstraction Environmental Management Plan Groundwater Abstraction Environmental Management Plan – Thornlie-Cockburn Link METRONET Stage 1 Initiatives: Yanchep Railway Extension and Thornlie-Cockburn Link Document Approval Rev Date Prepared by Reviewed By Approved by 0 23-Sep-2020 Michael Chen Lionel Pero Declan Larkin 1 19-Nov-2020 Klinton Breese Lionel Pero Stuart Wright Signature: Signature: Signature: Signature: Document Details PTA Project number: 180093 PTA Document number: N/A NEWest Document number: W801032-TCL-NEW-EN-PLN-0009 Revision date: 19-Nov-2020 Revision: 1 Groundwater Abstraction Environmental Management Plan – Thornlie-Cockburn Link W801032-TCL-NEW-EN-PLN-0009.Rev 1 Uncontrolled Document when Printed Page 1 of 44 DETAILS OF REVISION AMENDMENTS AND PLAN TERMINOLOGY Document Control The Alliance Manager is responsible for ensuring that this plan is reviewed and approved. The Environment and Sustainability Manager is responsible for updating this plan to reflect changes as required. Amendments Any revisions or amendments must be approved by the Alliance Manager and/or client before being distributed or implemented. Revision Details Revision Details 0 Issued for use 1 Issued for use Terms and Definitions Term Meaning Groundwater Level The level at which the pressure in the pore water in the subsurface material is atmospheric. The terms groundwater level, phreatic surface, groundwater table and water table may be used interchangeably. If Perched Groundwater conditions exist there may be more than one groundwater level at any particular plan position. Abbreviations and Acronyms Abbreviation/Acronym Definition AHD Australian Height Datum ASS Acid Sulfate Soils CCW Conservation Category Wetland CEO Chief Executive Officer DWER Department of Water and Environmental Regulation EMP Environmental Management Plan EPA Environmental Protection Agency kL/yr Kilolitre per year L/s Litre per second MS Ministerial Statement Groundwater Abstraction Environmental Management Plan – Thornlie-Cockburn Link W801032-TCL-NEW-EN-PLN-0009. Rev 1 Uncontrolled Document when Printed Page 2 of 44 Abbreviation/Acronym Definition OLE Overhead Line Equipment PCG Perth Coastal Grid PTA Public Transport Authority of Western Australia TCL Thornlie - Cockburn Link TEC Threatened Ecological Community Groundwater Abstraction Environmental Management Plan – Thornlie-Cockburn Link W801032-TCL-NEW-EN-PLN-0009. Rev 1 Uncontrolled Document when Printed Page 3 of 44 CONTENTS 1. Context, Scope and Rationale ............................................................................................................ 8 1.1 Proposal ..................................................................................................................................... 8 1.2 Key Environmental Factors ......................................................................................................... 8 1.2.1 Hydrogeology................................................................................................................ 9 1.2.2 Construction Water Supply Source ................................................................................ 9 1.3 Condition Requirements............................................................................................................ 12 1.4 Rationale and Approach............................................................................................................ 14 1.5 Surveys and Study Findings...................................................................................................... 14 1.5.1 Preliminary Hydrogeological Assessment (Golder, 2019)............................................. 15 1.5.2 Groundwater Monitoring Event 1 (Golder, 2020a) ........................................................ 16 1.6 Key Assumptions and Uncertainties .......................................................................................... 17 1.7 Management Approach ............................................................................................................. 17 1.7.1 Key Impacts and Risks ................................................................................................ 17 1.7.2 Management Approach ............................................................................................... 18 1.8 Rationale for Choice of Provisions ............................................................................................ 19 1.9 Index of Biodiversity Surveys for Assessments (IBSA) .............................................................. 19 2. Environmental Management Plan Provisions ................................................................................. 19 2.1 Condition Requirements............................................................................................................ 20 2.2 Outcomes and Key Environmental Values................................................................................. 20 2.3 Environmental Criteria .............................................................................................................. 20 2.3.1 Rationale for Setting Threshold Criteria and Trigger criteria ......................................... 21 2.4 Management Objectives and Actions ........................................................................................ 22 2.5 Monitoring................................................................................................................................. 23 2.5.1 Monitoring Locations and Well Details ......................................................................... 23 2.5.2 Monitoring Program .................................................................................................... 25 2.5.3 Monitoring Methodology .............................................................................................. 26 2.6 Contingency Actions ................................................................................................................. 28 2.6.1 Trigger Criteria Contingency Actions ........................................................................... 28 2.6.2 Threshold Criteria Contingency Actions ....................................................................... 29 2.7 Reporting .................................................................................................................................. 30 2.7.1 Monitoring Report ....................................................................................................... 30 2.7.2 Annual Compliance Assessment ................................................................................. 30 2.7.3 Reporting on Exceedance of Trigger and/or Threshold Criteria .................................... 31 3. Adaptive Management and Review of the EMP ............................................................................... 31 3.1 Adaptive Management .............................................................................................................. 31 3.2 Review of EMP ......................................................................................................................... 32 Groundwater Abstraction Environmental Management Plan – Thornlie-Cockburn Link W801032-TCL-NEW-EN-PLN-0009. Rev 1 Uncontrolled Document when Printed Page 4 of 44 4. Stakeholder Consultation................................................................................................................. 32 5. References ........................................................................................................................................ 33 Figures ..................................................................................................................................................... 34 Tables Table 1: Project Summary ........................................................................................................................... 7 Table 2: Indirect Impacts Relevant to Groundwater Abstraction .................................................................... 9 Table 3: Production Well Details ................................................................................................................ 11 Table 4: Condition Requirements and In-Plan Section References ............................................................. 12 Table 5: Assessment of Suitability of the Production Wells (Golder, 2019) ................................................. 15 Table 6: Suitability of Production Wells Location ........................................................................................ 16 Table 7: Bore Location Details and Distance to Nearest Potential Impact Area ........................................... 18 Table 8: Ministerial Statement 1114 Condition to Develop the EMP ........................................................... 20 Table 9: Interim Groundwater Level Trigger Criteria and Threshold Criteria for Monitoring Wells ................ 22 Table 10: Management of Key Impact ........................................................................................................ 22 Table 11: Monitoring Well Details ..............................................................................................................
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