Summary of risk Table 64 summarises the identified hazards and the final residual impact or risk for planned and unplanned events. Table 65 and Table 66 discuss the potential impacts and proposed control and mitigation measures for all planned and unplanned events associated with Otway offshore operations. Table 64: Summary of the environmental risks for events associated with Otway offshore operations activity Residual Aspect impact or risk Planned events IMP-01 Fisheries and marine users are impacted by the physical Low presence of offshore infrastructure and vessels IMP-02 Light emissions from the platform and vessels Low IMP-03 Noise and vibration levels from the platform, vessel and Low helicopter operations IMP-04 Planned and fugitive discharges of hydraulic fluid from Low operation and maintenance of the Geographe and Thylacine hydraulic control system IMP-05 Planned and fugitive marine discharges from the platform, Low pipeline and vessels. IMP-06 Emissions of atmospheric pollutants and greenhouse gases Low (GHG). Unplanned events RSK-01 Loss of containment (LOC) - uncontrolled hydrocarbon Medium release from wells and production equipment. RSK-02 Loss of containment (LOC) - uncontrolled hydrocarbon Medium release from pipeline. RSK-03 Loss of containment (LOC) - uncontrolled release from the Low Mono Ethylene Glycol (MEG) pipeline. RSK-04 Loss of containment (LOC) of chemicals from Low platform/vessels are directly or indirectly released to the marine environment. RSK-05 Loss of marine diesel from vessels Low RSK-06 Collision with cetaceans and pinnipeds Low RSK-07 Introduction of marine pests from vessels Low RSK-08 Disturbance to the benthic environment (seabed habitat and Low fauna). RSK-09 Bird control method for the platform helideck injures or kills Low birds RSK-10 OIL SPILL RESPONSE RISK: Shoreline assessment crew Low require access to shoreline RSK-11 OIL SPILL RESPONSE RISK: Oiled wildlife response Low (OWR). RSK-12 Mobilising a mobile offshore drill unit and drilling of a relief Low well
Summary of risk Table 64 summarises the identified hazards and the final residual impact or risk for planned and unplanned events. Table 65 and Table 66 discuss the potential impacts and proposed control and mitigation measures for all planned and unplanned events associated with Otway offshore operations. Table 64: Summary of the environmental risks for events associated with Otway offshore operations activity Aspect Residual impact or risk Planned events IMP-01 Fisheries and marine users are impacted by the physical presence of offshore infrastructure and vessels Low IMP-02 Light emissions from the platform and vessels Low IMP-03 Noise and vibration levels from the platform, vessel and helicopter operations Low IMP-04 Planned and fugitive discharges of hydraulic fluid from operation and maintenance of the Geographe and Thylacine hydraulic control system Low IMP-05 Planned and fugitive marine discharges from the platform, pipeline and vessels. Low IMP-06 Emissions of atmospheric pollutants and greenhouse gases (GHG). Low Unplanned events RSK-01 Loss of containment (LOC) - uncontrolled hydrocarbon release from wells and production equipment. Medium RSK-02 Loss of containment (LOC) - uncontrolled hydrocarbon release from pipeline. Medium RSK-03 Loss of containment (LOC) - uncontrolled release from the Mono Ethylene Glycol (MEG) pipeline. Low RSK-04 Loss of containment (LOC) of chemicals from platform/vessels are directly or indirectly released to the marine environment. Low RSK-05 Loss of marine diesel from vessels Low RSK-06 Collision with cetaceans and pinnipeds Low RSK-07 Introduction of marine pests from vessels Low RSK-08 Disturbance to the benthic environment (seabed habitat and fauna). Low RSK-09 Bird control method for the platform helideck injures or kills birds Low RSK-10 OIL SPILL RESPONSE RISK: Shoreline assessment crew require access to shoreline Low RSK-11 OIL SPILL RESPONSE RISK: Oiled wildlife response (OWR). Low RSK-12 Mobilising a mobile offshore drill unit and drilling of a relief well Low