I don't think we know the whole story yet information is being withheld...
"EPA did not immediately respond to requests for comment. It is under fire from Congress for allowing BP and the coast guard to ignore its order last May to cut the use of dispersants by 75%. Documents released by the Massachusetts Democrat Ed Markey this week show the EPA allowed spraying of dispersants 74 times over a period of 48 days. At times, the EPA gave advance approval for the use of dispersants for up to a week. The documents also showed the EPA allowed BP to spray 36,000 gallons of Corexit in a single day. The controversy surrounding EPA's role in the oil spill marks a turning point for the Obama administration, which came to power vowing to repair the frayed relationship between scientists and government under George Bush and promising a new era of transparency.
Nine leading scientists have written a public letter calling on BP and the Obama administration to release all scientific data related to the spill, including wildlife death. "Just as the unprecedented use of dispersants has served to sweep millions of gallons of oil under the rug, we're concerned the public may not get to see critical scientific data until BP has long since declared its responsibility over," said Bruce Stein of the National Wildlife Federation."