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
Oil spill governance in the United States The OPA is the primary legislation that governs oil spills in the U.S. The establishment of the OPA substantiated the federal government's role in responding to oil spill cleanups. The OPA made amendments to the already existing CWA to provide 3 options to the delegated authorities through the president. The options include conducting immediate cleanup by federal authorities, to monitor the response of the responsible party or commandeer the cleanup activities of the responsible party. Hence giving the federal government the authority to determine the level of cleanup required. A second significant amendment the OPA makes to the CWA is