• Otway Basin Exploration Drilling Environment Plan Summary CONTROLLED DOCUMENT (VOB-EN-EMP-0002) Revision 1 – March 2019 Otway Basin Exploration Drilling Environment Plan Summary Table of Contents List of Tables ...................................................................................................................................... iii List of Figures .................................................................................................................................... iv Revision History ................................................................................................................................. iv 1 Introduction ............................................................................................................................... 1 1.1 Titleholder Details ....................................................................................................................... 1 2 Activity Location ....................................................................................................................... 2 2.2 Prospective Field Characteristics ............................................................................................... 3 2.3 Support Activities ........................................................................................................................ 4 2.4 Exploration Drilling Activities ....................................................................................................... 6 3 Description of the Environment .............................................................................................. 9 3.1 Environment that may be affected (EMBA) ................................................................................ 9 3.2 Regional Setting ........................................................................................................................ 10 3.3 Ecological and Social Receptors .............................................................................................. 10 4 Environmental Impact and Risk Assessment Methodology .............................................. 26 4.1 Impact and Risk Evaluation ...................................................................................................... 27 4.2 Monitor and Review .................................................................................................................. 31 5 Risk and Impact Evaluation ................................................................................................... 32 5.1 Physical Interaction (Collision with Marine Fauna) ................................................................... 32 5.2 Physical Interaction (Other Marine Users) ................................................................................ 35 5.3 Light Emissions ......................................................................................................................... 37 5.4 Underwater Sound Emissions................................................................................................... 39 5.5 Physical Presence – Seabed Disturbance ................................................................................ 45 5.6 Atmospheric Emissions ............................................................................................................. 48 5.7 Planned Discharge – Drilling Cuttings and Fluid ...................................................................... 50 5.8 Planned Discharge – Cement ................................................................................................... 54 5.9 Planned Discharge – Cooling Water and Brine ........................................................................ 57 5.10 Planned Discharge - Treated Bilge ........................................................................................... 60 5.11 Planned Discharge - Sewage and Food Waste ........................................................................ 62 5.12 Planned Discharge - Ballast water and Biofouling .................................................................... 64 5.13 Operational Discharges - Subsea ............................................................................................. 67 5.14 Accidental Release - Waste ...................................................................................................... 69 5.15 Accidental Release (Minor) ....................................................................................................... 72 5.16 Accidental Release (Vessel Collision) ...................................................................................... 74 5.17 Accidental Release (Loss of Well Control) ............................................................................... 82 6 Emergency Response Overview ........................................................................................... 90 6.1 Oil Spill response strategies ..................................................................................................... 90 6.2 Spill Response: Source Control ................................................................................................ 96 6.3 Spill Response: Monitor and Evaluate ...................................................................................... 96 6.4 Dispersant Application .............................................................................................................. 97 6.5 Spill Response: Protect and Deflect ......................................................................................... 97 6.6 Spill Response: Shoreline Assessment and Clean-up ............................................................. 98 6.7 Spill Response: Oiled Wildlife Response .................................................................................. 98 VOB-EN-EMP-0002 / UNCONTROLLED WHEN PRINTED Page ii Otway Basin Exploration Drilling Environment Plan Summary 6.8 Risk Assessment of Oil Spill Response Strategies ................................................................... 99 6.9 Dispersant Application ............................................................................................................ 100 6.10 Protect and Deflect ................................................................................................................. 102 6.11 Shoreline Assessment and Clean-up ...................................................................................... 103 6.12 Oiled Wildlife Response .......................................................................................................... 104 7 Implementation Strategy ...................................................................................................... 106 7.1 Cooper Energy Management System ..................................................................................... 106 7.2 Emergency Response ............................................................................................................. 106 7.3 Chemical Assessment and Selection ...................................................................................... 109 7.4 Invasive Marine Species Risk Assessment ............................................................................ 109 7.5 Management of Change ......................................................................................................... 109 7.6 Incident Reporting .................................................................................................................... 110 7.7 Environmental Performance Monitoring and Reporting ........................................................... 110 7.8 Records Management .............................................................................................................. 112 8 Stakeholder Consultation .................................................................................................... 113 8.1 Provision of Sufficient Information ........................................................................................... 117 8.2 Assessment of Claims and Feedback ..................................................................................... 117 8.3 Ongoing Stakeholder Consultation .......................................................................................... 118 9 Acronyms and Abbreviations .............................................................................................. 145 10 Units ....................................................................................................................................... 150 11 References ............................................................................................................................. 151 List of Tables Table 1-1: Details of Titleholder and Stakeholder Liaison Person .......................................................... 1 Table 2-1 Otway Exploration Well Indicative Coordinates ...................................................................... 2 Table 2-2: Physical Characteristics of Waarre Gas ................................................................................. 4 Table 3-1: Presence of Ecological Receptors within the Operational Area and the Area Potentially Exposed to Hydrocarbons ..................................................................................................................... 11 Table 3-2: Presence of Conservation Values & Social Receptors within the Operational Area and the Area Potentially Exposed to Hydrocarbons .........................................................................................