Environmental Statement - Maersk Oil

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Balloch Field Development Environmental Statement Appendix B ‐ Environmental Assessment Noise Noise from installation. Minor accidental event Infrastructure All infield subsea infrastructure Mattresses may cause smothering of benthos and alter the habitat type, thus affecting communities in the area. Potential impacts to fishing activities. Surface & subsea noise produced during operations, of which piling of the cooling spool is likely to be the dominant sound Chemical spills Chemical storage‐ accidental spills, leaks, containment damage Lube and hydraulic oil spills Accidental spillage of oils may result from rupture/corrosion of drums in storage; loss of containment during decanting; rupture of hydraulic hose in use. Spill may enter drainage system and be discharged to sea Likelihood Consequence Risk 5 1 Low Generates elevated sound levels which can affect the behaviour of fish and marine mammals in the area. Likelihood Consequence Risk 5 3 Moderate May result in a variety of impacts including increased chemical or biochemical oxygen demand, toxicity, persistence, bioaccumulation in animals Likelihood Consequence Risk 2 2 Low Minor spillage that would impair water quality and marine life in immediate vicinity of discharge. Likelihood Consequence Risk 2 1 Low Minimisation of foot‐ print through design. Optimisation of pipeline route. Impact area is expected to rapidly restore/ recolonise. JNCC piling protocol followed. Optimised quantities procured & stored. COSHH, Task Hazard Assessments are completed and MSDS sheets are available. All transfer operations suspended in rough weather. All bulk hoses and connections must be inspected before and after use by competent personnel. Chemicals stored in tote tank area. OPEP is implemented as appropriate in the result of a spill as per Emergency Response Process. Trained personnel undertake decanting operations. Storage tanks and hoses are subject to an inspection and engineering maintenance strategy. OPEP is implemented in the event of a spill as per Emergency Response Process. Temporal physical disturbance effect on local benthic communities recovery expected with time. Hard structures will act as attract different species. Low impact. Short term impact upon sensitive species, no impacts beyond the installation activities . Low impact. None envisaged. None envisaged. B ‐ 7
Production Phase Environmental Aspect Source Emissions to air Flaring of Balloch reservoir fluids B ‐ 8 Diesel spills Accidental spillage during bunkering operations and rupture of diesel tanks. Activity Description Flaring occurs during emergencies and blowdowns. No increase in flaring is anticipated with the additional production on the GPIII FPSO Venting Increased venting required as Balloch will result in increased production and frequency of tanker offloading. The exhaust gases are diverted into the fuel tanks prior to loading with oil. Impacts depend on spill size, prevailing wind, sea state & temperature & sensitivity of environmental features affected. Birds are most sensitive offshore receptor. Also affected are plankton, fish/fisheries, seabed animals & marine mammals. Affect also on amenity value, property (e.g. vessels in marinas) & commercial interests. Likelihood Consequence Risk 2 1 Low Potential effects and significance of potential impacts Flaring may contribute to climate change (CH4, CO2), acidification effects (SOx, NOx) and potential localised smog formation (VOC, NOx and particulates). Likelihood Consequence Risk 2 1 Low Releases greenhouse gases into the environment, these gases were derived from combustion gases (CO2). Venting gases contribute to greenhouse warming. Likelihood Consequence Risk 4 1 Low Balloch Field Development Environmental Statement Trained deck operations personnel. Diesel storage tanks and transfer hoses are subject to inspection & engineering maintenance strategy. Bunded storage tanks. OPEP is implemented in the event of a spill as per Emergency Response Process. Oil spill modelling completed as an integral part of OPEP. Mitigation of impacts and actions to address concerns Rapid dispersion and reduction to background levels. Compliance with Flaring Consent. Minimum start up frequency, adherence to good operating practices, maintenance programmes & optimisation of quantities of gas flared. UK and EU air quality standards not exceeded. Engines are maintained properly to ensure optimal fuel combustion for venting gases and minimise release of gases with a high global warming potential such as methane. Appendix B ‐ Environmental Assessment None envisaged diesel should rapidly evaporate and disperse, diesel evaporates contribute are a form of greenhouse gases. Residual impact and/or concern None envisaged as contribution of emissions to worldwide levels is negligible when compared to other industrial sources. Increase global greenhouse emissions. Low impact.
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Balloch Field Development Environme
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Page 147 and 148: Balloch Field Development Environme
Page 193 and 194: B ‐ 2 Halocarbon release during e
Page 195 and 196: B ‐ 4 Lube and hydraulic oil spil
Page 197: Discharges to Sea Discharge from pi
Page 201 and 202: B ‐ 10 Drainage water Discharge o
Page 203 and 204: Physical presence Oil and gas infra
Page 205 and 206: Major accidental events Other envir
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Environmental Statement - Maersk Oil

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