DOCUMENT NO REVISION DATE OF REVISION HSE-E-075-SUM 4 14 OCTOBER 2019 Perth Basin Well Intervention Activities Environment Plan Summary Perth Basin Well Intervention Activities Environment Plan Summary TABLE OF CONTENTS 1.0 INTRODUCTION ............................................................................................................................... 7 1.1 Contact Details ............................................................................................................................... 7 1.2 Purpose .......................................................................................................................................... 9 1.3 Environment Plan Implementation ................................................................................................ 9 2.0 DESCRIPTION OF THE ACTIVITY ...................................................................................................... 10 2.1 Scope ............................................................................................................................................ 10 2.2 Location ........................................................................................................................................ 10 2.3 WIA related activities ................................................................................................................... 15 2.4 Well Intervention Activities ......................................................................................................... 15 2.4.1 Timeframes ................................................................................................................... 15 2.4.2 Chemical Disclosure for Products, Additives, Chemicals and Other Substances ......... 15 2.4.3 Decommissioning (Plug and Abandonment) Activities ................................................ 16 2.5 Demobilisation ............................................................................................................................. 16 2.6 Rehabilitation ............................................................................................................................... 16 2.7 Utilities and Services .................................................................................................................... 16 2.7.1 Water ............................................................................................................................ 16 2.7.2 Refuelling ...................................................................................................................... 16 2.7.3 Electricity ...................................................................................................................... 17 2.7.4 Offices and Storage Areas ............................................................................................ 17 2.7.5 Chemical Storage .......................................................................................................... 17 2.7.6 Waste Disposal ............................................................................................................. 18 3.0 DESCRIPTION OF THE ENVIRONMENT ............................................................................................ 20 3.1 Physical Environment ................................................................................................................... 20 3.1.1 Climate .......................................................................................................................... 20 3.1.2 Soil ................................................................................................................................ 20 3.1.3 Surface and Groundwater Systems .............................................................................. 20 3.2 Biological Environment ................................................................................................................ 20 3.2.1 WA Biodiversity Search ................................................................................................ 21 3.2.2 Australian Protected Matters Search ........................................................................... 21 3.2.3 Conservation Area ........................................................................................................ 22 3.2.4 Environmentally Sensitive Areas .................................................................................. 24 3.2.5 Groundwater Dependent Ecosystems .......................................................................... 24 3.2.6 Vegetation Communities and Flora .............................................................................. 24 3.2.7 Weeds ........................................................................................................................... 25 3.2.8 Dieback ......................................................................................................................... 26 3.2.9 Fauna ............................................................................................................................ 26 3.3 Heritage ........................................................................................................................................ 28 3.3.1 Aboriginal Heritage ....................................................................................................... 28 HSE-E-075-SUM Rev 4 Page 3 of 40 Perth Basin Well Intervention Activities Environment Plan Summary 3.3.2 European Heritage ........................................................................................................ 30 3.4 Socio-economic Environment ...................................................................................................... 30 4.0 ENVIRONMENTAL RISK ASSESSMENT AND MANAGEMENT ............................................................ 31 4.1 Risk Management and Justification of ALARP ............................................................................. 31 4.2 Risk Classification and Reporting Requirements ......................................................................... 31 5.0 IMPLEMENTATION STRATEGY ........................................................................................................ 35 5.1 Systems, Practices and Procedures.............................................................................................. 36 5.2 Record Keeping ............................................................................................................................ 38 6.0 CONSULTATION ............................................................................................................................. 39 7.0 REFERENCES .................................................................................................................................. 40 LIST OF FIGURES Figure 1: Map of MEPAU Perth Basin Permits and Producing Fields ............................................................ 8 Figure 2: Map of Potential Wells to be intervened in the L1 (Hovea Area) ................................................ 11 Figure 3: Map of Potential Wells to be intervened in the L1 (Dongara) and L2 ......................................... 12 Figure 4: Map of Potential Wells to be intervened in L4 and L5 (Woodada) ............................................. 13 Figure 5: Map of Potential Wells to be intervened in L1 (Waitsia) ............................................................. 14 Figure 6: Nature Reserves, ESAs and Water Supply Areas within MEPAU Permit Areas ........................... 23 Figure 7: Registered Aboriginal Heritage Sites Perth Basin Permit Areas .................................................. 29 LIST OF TABLES Table 1 Acronyms ....................................................................................................................................... 6 Table 2: WIA Waste Disposal ..................................................................................................................... 18 Table 3: NatureMap Species Search Summary .......................................................................................... 21 Table 4: EPBC Act Protected matters report search summary .................................................................. 21 Table 5: Conservation Significant Fauna Desktop Search (incorporating Field Survey Results) ............... 27 Table 6: WIA Risk Assessment ................................................................................................................... 32 Table 7: Systems, Practices and Procedures.............................................................................................. 36 Table 8a: System Details .............................................................................................................................. 43 Table 8b: Product List .................................................................................................................................. 43 Table 8c: Chemical List ................................................................................................................................ 51 Table 9: Products, additives, chemicals and other substances (Cementing) ............................................ 54 Table 9a: System Details .............................................................................................................................. 54 Table 9b: Product List 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