http://www.guardian.co.uk/environment/2011/jul/18/bp-pipeline-leak-lisburne-alaska<snip>
BP reported yet another pipeline leak at its Alaskan oilfields, frustrating the oil giant's attempts to rebuild its reputation after the Gulf of Mexico oil spill. BP has said that a pipeline at its 30,000 barrel per day Lisburne field, which is currently closed for maintenance, ruptured during testing and spilled a mixture of methanol and oily water onto the tundra.
The company has a long history of oil spills at its Alaskan pipelines – accidents which have hurt its public image in the US, where around 40% of its assets are based.
The Alaska Department of Environmental Conservation said the spill occurred on Saturday and amounted to 2,100 to 4,200 gallons. A BP spokesman said the cleanup was under way and the company would determine the cause "in due course."
Lisburne, which is managed as part of the Greater Prudhoe Bay Unit, has produced no oil since 18 June, according to Alaska Oil and Gas Conservation Commission records, suggesting maintenance work requiring a prolonged shutdown. The spokesman said the field had been undergoing "its annual maintenance."