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
Torrey Canyon oil spill and other substances used in an effort to mitigate damage. At the time, it was the world's worst oil spill, and led to significant changes in maritime law and oil spill responses. It remains the worst spill in UK history. When laid down in the United States in 1959, "Torrey Canyon" had a capacity of 60,000 tons; the ship was later enlarged to 120,000 tons in Japan. She was named for a geographical feature in California. At the time of the accident, "Torrey Canyon" was registered in Liberia and owned by Barracuda Tanker Corporation, a subsidiary of Union Oil Company