An oil spill is the release of a liquid petroleum hydrocarbon into the environment, especially the marine ecosystem, due to human activity, and is a form of pollution. The term is usually given to marine oil spills, where oil is released into the ocean or coastal waters, but spills may also occur on land. Oil spills may be due to releases of crude oil from tankers, offshore platforms, drilling rigs and wells, as well as spills of refined petroleum products and their by-products, heavier fuels used by large ships such as bunker fuel, or the spill of any oily refuse or waste oil.
The Oil Pollution Act of 1990 (OPA) was passed by the 101st United States Congress and signed by President George H. W. Bush. It works to avoid oil spills from vessels and facilities by enforcing removal of spilled oil and assigning liability for the cost of cleanup and damage, requires specific operating procedures; defines responsible parties and financial liability; implements processes for measuring damages; specifies damages for which violators are liable; and establishes a fund for damages, cleanup, and removal costs. This statute has resulted in instrumental changes in the oil production, transportation, and distribution industries.
Ship grounding is the impact of a ship on seabed or waterway side. It may be intentional, as in beaching to land crew or cargo, and careening, for maintenance or repair, or unintentional, as in a marine accident. In accidental cases, it is commonly referred to as "running aground."
The Deepwater Horizon drilling rig explosion was the April 20, 2010, explosion and subsequent fire on the Deepwater Horizon semi-submersible Mobile Offshore Drilling Unit (MODU), which was owned and operated by Transocean and drilling for BP in the Macondo Prospect oil field about 40 miles (64 km) southeast off the Louisiana coast. The explosion and subsequent fire resulted in the sinking of the Deepwater Horizon and the deaths of 11 workers; 17 others were injured. The same blowout that caused the explosion also caused an oil well fire and a massive offshore oil spill in the Gulf of Mexico, considered the largest accidental marine oil spill in the world, and the largest environmental disaster in U.S. history.
Corexit is a product line of oil dispersants used during oil spill response operations. It is produced by Nalco Holding Company, associated with BP and Exxon and an indirect subsidiary of Ecolab. Corexit was originally developed by the Standard Oil Company of New Jersey. Corexit is typically applied by aerial spraying or spraying from ships directly onto an oil slick. On contact with the dispersant, oil that would otherwise float on the surface of the water is emulsified into tiny droplets and sinks or remains suspended in the water. In theory this allows the oil to be more rapidly degraded by bacteria (bioremediation) and prevents it from accumulating on beaches and in marshes.
The following is a timeline of the Deepwater Horizon oil spill. It was a massive oil spill in the Gulf of Mexico, the largest offshore spill in U.S. history. It was a result of the well blowout that began with the Deepwater Horizon drilling rig explosion on April 20, 2010.
Following is a timeline of the Deepwater Horizon oil spill for June 2010.
Following is a timeline of the Deepwater Horizon oil spill for July 2010.
A Whale is a Liberian-flagged ore-oil carrier built in 2010 by Hyundai Heavy Industries, Ulsan, South Korea for TMT Co. Ltd. from the Republic of China (Taiwan). She has seven other sister ships in the fleet, built in 2010-2011 and named in succession: B Whale, C Whale etc., to H Whale.
Reactions to the Deepwater Horizon oil spill from various officials and interested parties ranged from blame and outrage at the damage caused by the spill, to calls for greater accountability on the part of the U.S. government and BP, including new legislation dealing with preventative security and clean-up improvements.
Efforts to stem the Deepwater Horizon oil spill were ongoing from the time that the Deepwater Horizon exploded on 4/20/2010 until the well was sealed by a cap on July 15, 2010. Various species of dolphins and other mammals, birds, and the endangered sea turtles have been killed either directly or indirectly by the oil spill. The Deepwater Horizon spill has surpassed in volume the 1989 Exxon Valdez oil spill as the largest ever to originate in U.S.-controlled waters; it is comparable to the 1979 Ixtoc I oil spill in total volume released.
Pacific Responder is a Responder-class oil-skimming vessel registered in Norfolk, Virginia and based in San Francisco, California.
Donald F. Boesch is a professor of marine science and, from 1990 to 2017, president of the University of Maryland Center for Environmental Science. From 2006-2017, he concurrently served as Vice Chancellor for Environmental Sustainability for the University System of Maryland. In 2010, he was appointed by President Barack Obama as a member of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling to investigate the root causes of the blowout at the Macondo Prospect in the Gulf of Mexico.
The Louisiana pancake batfish, Halieutichthys intermedius, belongs to the batfish family Ogcocephalidae. It is native to the Gulf of Mexico, and was discovered in 2010. The known range of the species lies within the area of the Gulf of Mexico which was affected by the Deepwater Horizon oil spill.
The 2010 Deepwater Horizon oil spill in the Gulf of Mexico has been described as the worst environmental disaster in the United States, releasing about 4.9 million barrels of crude oil making it the largest marine oil spill. Both the spill and the cleanup efforts had effects on the environment.
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 4.9 million barrels 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 810,000 barrels of oil which was collected before it could enter the Gulf waters.
The Deepwater Horizon oil spill occurred between April 10 and September 19, 2010 in the Gulf of Mexico. A variety of techniques were used to address fundamental strategies for addressing the spilled oil, which were: to contain oil on the surface, dispersal, and removal. While most of the oil drilled off Louisiana is a lighter crude, the leaking oil was of a heavier blend which contained asphalt-like substances. According to Ed Overton, who heads a federal chemical hazard assessment team for oil spills, this type of oil emulsifies well. Once it becomes emulsified, it no longer evaporates as quickly as regular oil, does not rinse off as easily, cannot be eaten by microbes as easily, and does not burn as well. "That type of mixture essentially removes all the best oil clean-up weapons", Overton said.
Nancy N. Rabalais is an American marine ecologist. Born in Wichita Falls, Texas, she is the daughter of Kathryn Charlotte Preusch and Stephen Anthony Nash, a mechanical engineer, and the second of four children. She researches dead zones in the marine environment and is an expert in eutrophication and nutrient pollution.
