Feds conclude: Three-quarters of oil from BP spill is gone

The government is expected to announce on Wednesday that three-quarters of the oil from the Deepwater Horizon leak has already evaporated, dispersed, been captured or otherwise eliminated — and that much of the rest is so diluted that it does not seem to pose much additional risk of harm.

A government report finds that about 26 percent of the oil released from BP’s runaway well is still in the water or onshore in a form that could, in principle, cause new problems. But most is light sheen at the ocean surface or in a dispersed form below the surface, and federal scientists believe that it is breaking down rapidly in both places…

The aggressive response mounted by BP and the government — the largest in history, ultimately involving more than 5,000 vessels — also played a role in getting rid of the oil, the report says. Fully 5 percent of the oil was burned at the surface, it estimates, while 3 percent was skimmed and 8 percent was broken up into tiny droplets using chemical dispersants. Another 16 percent dispersed naturally as the oil shot out of the well at high speed.