Environmental Hazard & Source Known and Potential Impact Controls Residual Risk Planned Activities Sensitive receptors identified and avoided Seabed Disturbance Localised disturbance or loss of Sponge and bryozoan habitat at ~ 50 m depth along the pipeline benthic habitat Erosion / sediment build up identified and communicated to IMR project team. due to infrastructure Localised turbidity of the IMR Program Work Plan Dropped objects during IMR column activities IMR Program Work Plan includes no equipment laydown or anchoring within Very Low Temporary placement of sponge and bryozoan habitat at ~ 50 m depth along the pipeline. (1) subsea infrastructure on Chemical Assessment Process seabed during IMR activities Santos Offshore Chemical Assessment Process used to assess and approve Vessel anchoring during IMR grout to be used in grout bags. activities Span rectification activities Underwater Noise Behavioural changes in Vessel/Cetacean Caution Zones Very Low Vessels will travel at less than 6 knots within the caution zone of a cetacean Vessel engines, thrusters and Localised avoidance. (1) (150 m radius for dolphins, 300 m for whales). ROV Localised fauna attraction Light Emissions Vessel lighting requirements Very Low External vessel lighting meets the requirements of the AMSA Marine Orders IMR vessel activities (1) Part 30 (Prevention of Collisions). Atmospheric Emissions Localised and temporary decrease in Marine diesel quality air quality Low-sulphur marine diesel used as primary fuel source. Combustion of fuel from vessel engines, deck Contribution to global greenhouse Equipment maintenance equipment gas effect Combustion equipment maintained in accordance with Planned Maintenance Very Low Incineration of waste System. (1) Air Pollution Certificate Vessels with gross tonnage > 400 t have International Air Pollution Certificate (IAPP). Incinerator certificate
Environmental Hazard & Source Known and Potential Impact Controls Residual Risk Planned Activities Seabed Disturbance Erosion / sediment build up due to infrastructure Dropped objects during IMR activities Temporary placement of subsea infrastructure on seabed during IMR activities Vessel anchoring during IMR activities Span rectification activities Localised disturbance or loss of benthic habitat Localised turbidity of the column Sensitive receptors identified and avoided Sponge and bryozoan habitat at ~ 50 m depth along the pipeline identified and communicated to IMR project team. IMR Program Work Plan IMR Program Work Plan includes no equipment laydown or anchoring within sponge and bryozoan habitat at ~ 50 m depth along the pipeline. Chemical Assessment Process Santos Offshore Chemical Assessment Process used to assess and approve grout to be used in grout bags. Very Low (1) Underwater Noise Vessel engines, thrusters and ROV Behavioural changes in Localised avoidance. Vessel/Cetacean Caution Zones Vessels will travel at less than 6 knots within the caution zone of a cetacean (150 m radius for dolphins, 300 m for whales). Very Low (1) Light Emissions IMR vessel activities Localised fauna attraction Vessel lighting requirements External vessel lighting meets the requirements of the AMSA Marine Orders Part 30 (Prevention of Collisions). Very Low (1) Atmospheric Emissions Combustion of fuel from vessel engines, deck equipment Incineration of waste Localised and temporary decrease in air quality Contribution to global greenhouse gas effect Marine diesel quality Low-sulphur marine diesel used as primary fuel source. Equipment maintenance Combustion equipment maintained in accordance with Planned Maintenance System. Air Pollution Certificate Vessels with gross tonnage > 400 t have International Air Pollution Certificate (IAPP). Incinerator certificate Very Low (1)
Patricia_Baleen_Non-Operational_Phase_Environment_Plan_Summary_DEDJTR.docx