Volume and extent of the Deepwater Horizon oil spill Volume and extent of the Deepwater Horizon oil spill The "Deepwater Horizon" oil spill was discovered on the afternoon of 22 April 2010 when a large oil slick began to spread at the former rig site. According to the Flow Rate Technical Group, the leak amounted to about of oil, exceeding the 1989 "Exxon Valdez" oil spill as the largest ever to originate in U.S.-controlled waters and the 1979 Ixtoc I oil spill as the largest spill in the Gulf of Mexico. BP has challenged this calculation saying that it is overestimated as it includes over of oil which was
Australian Marine Oil Spill Centre 24-hour stand-by. The AMOSplan is voluntary mutual aid arrangement where oil company equipment may be shared to best respond to a spill. AMOSplan replaced the former Marine Oil Spills Action Plan (MOSAP). The MOSAP was activated when an oil spill became too large for an individual company to adequately deal with. Integration with government responses to spills is framed within the National Plan to Combat Pollution of the Sea by Oil, which is managed by the Australian Maritime Safety Authority. In 2009, AMOSC responded to the Montara oil spill in the Timor Sea by mobilising aircraft and dispersant for aerial