US Government Report Indicates Three-Quarters of Oil has Disappeared

And officials say they’re pretty confident about their calculations.

“There’s absolutely no evidence that there’s any significant concentration of oil out there we haven’t accounted for,” says the head of the National Oceanic and Atmospheric Administration. But “I think we don’t know yet the full impact of this spill on the ecosystem or the people of the Gulf,” she added.

Nearly three-quarters of the oil — more than 152 million gallons — has been collected at the well by a temporary containment cap, been cleaned up or chemically dispersed, or naturally deteriorated, evaporated or dissolved, the report said.

That leaves nearly 53 million gallons in the Gulf. The amount remaining — or washed up on the shore — is still nearly five times the size of the 11 million-gallon Exxon Valdez spill, which wreaked environmental havoc in Alaska in 1989.