Environmental Statement - Maersk Oil

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Balloch Field Development Environmental Statement Appendix B ‐ Environmental Assessment Disposal to land General waste from drilling operations and support vessels. Physical presence Installation of rig and presence of vessels Drilling rigs and support vessels generate a number of wastes during routine operations including waste oil, chemical & oil contaminated water, scrap metal domestic wastes etc. Positioning of semi‐sub rig at wells using anchors (12) and chains Support vessel e.g. anchor handling vessels & tug vessel, movements. Under water noise Noise and vibration Sources include semi‐sub drilling operations & support vessels Minor accidental events Chemical spills Chemical storage‐ accidental spills, leaks, containment damage. 5 1 Low Impacts associated with onshore disposal are dependent on the nature of the site or process. Landfills – land take, nuisance, emissions (methane), possible leachate, limitations on future land use. Treatment plants‐ nuisance, atmospheric emissions, potential for contamination of sites. Likelihood Consequence Risk 5 1 Low The drilling rig will have an impact on the seabed due to the anchor spread. Presence of a rig and the increase in associated vessel movements has the potential to impact other users of the 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 1 Low 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 Wastes will be minimised by use of appropriate procurement controls. All wastes to be properly segregated for recycling/disposal/ treatment onshore. Waste will be dealt with in accordance with regulatory requirements. The rig will be present for as short a time as possible. Rig moves will be minimised. Other users of the area will be notified. Use of vessels kept to a minimum. The rig will be present over a relatively short period of time. Minimise rig movements. Optimised quantities procured & stored. COSHH, Task Hazard Assessments are completed and MSDS sheets are available. Transfer operations suspended in rough weather. Bulk hoses and connections inspected before and after use by competent personnel. Hoses on bard the NTVL are replaced annually. OPEP procedures followed Contribute to landfall waste. Low impact. Short term and very localised impact . No long term impacts to other sea users. Low impact Contribute to increase in ambient noise levels. Low impact. Mitigation measures will ensure risk of chemical spill are within tolerable risk levels. Low impact. B ‐ 3
B ‐ 4 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 Diesel spills Accidental spillage during bunkering operations and rupture of diesel tanks. Oil spills Loss of hydrocarbon containment includes accidental discharges of untreated OBMs, OBM contaminated cleaning fluids, drillings etc. Minor spillage that would impair water quality and marine life in immediate vicinity of discharge. Likelihood Consequence Risk 2 2 Low 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 Impact dependent on spill volume and weather conditions. 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 2 Low Balloch Field Development Environmental Statement Trained personnel undertake decanting operations. OPEP is implemented in the event of a spill as per Emergency Response Process. Oil spill modelling completed as an integral part of the OPEP. Trained personnel involved in fuel transfer. 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. Procedures in OPEP are implemented should a spill occur. Training is provided on oil spill response to all appropriate personnel. Maersk are members of OSRL (OSRL are on standby to provide oil spill clean‐up when required). Tanks have a spill over area. Appendix B ‐ Environmental Assessment Mitigation measures will ensure risk of chemical / oil spill are within tolerable risk levels. Low impact. Diesel should rapidly evaporate and disperse, diesel evaporates contribute are a form of greenhouse gases Mitigation measures will ensure risk of a spill are within tolerable levels. Low impact. Spills may cause local elevation of hydrocarbon levels and contamination and toxic effects. Mitigation measures will ensure actual risk of a spill are within tolerable levels.
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Page 193: B ‐ 2 Halocarbon release during e
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Page 205 and 206: Major accidental events Other envir
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Environmental Statement - Maersk Oil

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