Gippsland Offshore Operations Environment Plan Summary CONTROLLED DOCUMENT (VGB-EN-EMP-0004) Revision 1 – April 2019 Gippsland Offshore Operations Environment Plan Summary Table of Contents 1 Introduction ............................................................................................................................... 1 1.1 Titleholder Details ....................................................................................................................... 2 2 Location of the Activity ............................................................................................................ 3 2.1 Overview ..................................................................................................................................... 3 2.2 Asset Description ........................................................................................................................ 5 2.3 Field Characteristics .................................................................................................................. 11 2.4 Activities that have the Potential to Impact the Environment .................................................... 12 3 Description of the Environment ............................................................................................ 14 3.1 Environment that May Be Affected............................................................................................ 14 3.2 Regional Setting ........................................................................................................................ 14 3.3 Ecological and Social Receptors .............................................................................................. 16 4 Impact and Risk Assessment ................................................................................................ 37 4.1 Environmental Aspect Identification .......................................................................................... 37 4.2 Impact and Risk Scoping .......................................................................................................... 37 4.3 Risk: Introduction of Invasive Marine Species .......................................................................... 51 4.4 Risk: Loss of Containment ........................................................................................................ 54 4.5 Summary of Control Measures Applicable to all Aspects of the Activity ................................... 67 5 Oil Spill Response Overview ................................................................................................. 70 5.1 Oil Spill Response Strategies ................................................................................................... 70 5.2 Response Priority Areas ........................................................................................................... 71 5.3 Pre-spill Net Environmental Benefits Assessment (NEBA) ...................................................... 71 5.4 Spill Response: Source Control ................................................................................................ 74 5.5 Spill Response: Monitor and Evaluate ...................................................................................... 74 5.6 Spill Response: Protect and Deflect ......................................................................................... 76 5.7 Spill Response: Shoreline Assessment and Clean-up ............................................................. 78 5.8 Spill Response: Oiled Wildlife Response .................................................................................. 80 6 Implementation Strategy ........................................................................................................ 83 6.1 Cooper Energy Management System ....................................................................................... 83 6.2 Emergency Response ............................................................................................................... 83 6.3 Chemical Assessment and Selection ........................................................................................ 85 6.4 Management of Change ........................................................................................................... 85 6.5 Incident Reporting ..................................................................................................................... 87 6.6 Environmental Performance Monitoring and Reporting ............................................................ 87 6.7 Records Management ............................................................................................................... 89 7 Stakeholder Consultation ...................................................................................................... 90 7.1 Provision of Information ............................................................................................................ 93 7.2 Assessment of Claims and Feedback ...................................................................................... 95 7.3 Summary of Stakeholder Consultation ..................................................................................... 95 VGB-EN-EMP-0004 / UNCONTROLLED WHEN PRINTED Page ii Gippsland Offshore Operations Environment Plan Summary 8 References ............................................................................................................................... 99 Appendix A: Environmental Impact and Risk Evaluation Methodology ................................... 103 A.1 Monitor and Review .............................................................................................................. 103 A.2 Definitions ............................................................................................................................. 103 A.3 Evaluate the potential impact (consequence) ................................................................... 104 A.4 Determine the ALARP decision context and identify control measures ........................ 105 A.4.1 Good Practice ........................................................................................................................ 106 A.4.2 Engineering Risk Assessment ............................................................................................ 107 A.4.3 Precautionary Approach ...................................................................................................... 107 A.5 Evaluating the likelihood of the impact (consequence) occurring .................................. 107 A.6 Assigning residual risk rating ............................................................................................. 108 A.7 Evaluate the acceptability of the potential impact and risk ............................................. 108 Tables Table 1-1: Details of Titleholder and Liaison Person ............................................................................... 2 Table 2-1: Co-ordinates of the Gippsland offhore infrastructure (Datum: GDA94) ................................. 3 Table 2-2: Gippsland Offshore Operations Infrastructure Petroleum Safety Zones ............................... 5 Table 2-3: Indicative Decommissioning Plan .......................................................................................... 9 Table 2-4: Basker Condensate Physical Properties (ROC 2010) ......................................................... 11 Table 2-5: PB Reservoir Conditions (Santos 2014) .............................................................................. 11 Table 2-6: Longtom Condensate Physical Properties (Santos 2015) ................................................... 11 Table 2-7: Physical Characteristics of Sole Gas (Cooper Energy 2018) .............................................. 12 Table 3-1: Presence of Ecological Receptors within the Operational Area and the EMBA .................. 17 Table 3-2: Presence of Social Receptors within the Operational Area and the EMBA ......................... 29 Table 4-1: Activity – Aspect Relationships ............................................................................................ 38 Table 4-2: Sole Operations Impact and Risk Scoping .......................................................................... 39 Table 4-3: BMG and PB Non-Production Impact and Risk Scoping ..................................................... 39 Table 4-4: IMR Impact and Risk Scoping .............................................................................................. 40 Table 4-5: Support Operations Impact and Risk Scoping ..................................................................... 41 Table 4-6: Introduction of Invasive Marine Species EIA / ERA ............................................................. 51 Table 4-7: Potential Loss of Containment Release Types, Causes and Estimated Volumes ............... 54 Table 4-8: Loss of Containment EIA / ERA ........................................................................................... 56 Table 4-9: Operations Control Measures .............................................................................................. 67 Table 4-10: IMR and Vessel Control Measures..................................................................................... 67 Table 5-1: Hydrocarbon spill risks associated with the activity ............................................................. 70 Table 5-2: Suitability of Response Options ..........................................................................................