The "Deepwater Horizon" oil spill was a major industrial accident on the Gulf of Mexico, which killed 11 people and injured 16 others, leaked about of oil with plus or minus 10% uncertainty, which makes it the largest accidental marine oil spill in the history of the petroleum industry, and cost to the company more than $65 billion of cleanup costs, charges and penalties. On 20 April 2010, the semi-submersible exploratory offshore drilling rig "Deepwater Horizon" located in the Macondo Prospect in the Gulf of Mexico exploded after a blowout. After burning for two days, the rig sank. The well was finally capped on 15 July 2010. Of of leaked oil was collected or burned while entered the Gulf waters. of Corexit dispersant was applied.