Oil and water

An underwater dispersant technique could help clean up the oil spill that is threatening ecosystems on the US coast of the Gulf of Mexico. Commonly, planes spray dispersants on to the ocean surface to break up an oil slick, so far more than 190,000 gallons of Corexit 9500 and Corexit EC9527A, made by Nalco Company Naperville, Illinois have been sprayed. The underwater approach could prevent oil from reaching the surface. The oil spill began when the Deepwater Horizon oil exploration platform sank after an explosion on April 20; the damaged wellhead is leaking an estimated 5,000 to 15,000 barrels of oil every day into the Gulf.