Apr 12, 2012 6:24 PM by AP
NEW ORLEANS (AP) - Shell says an oil sheen off the coast of Louisiana has broken up and is dissipating.
The source of the sheen in the Gulf of Mexico remains unknown. The sheen, which was about a mile wide and 10 miles long was spotted Wednesday afternoon in the area of two Royal Dutch Shell PLC production platforms. But the oil giant said it's confident the oil didn't come from its operations.
The company was aiding federal agencies by using two remotely controlled underwater vessels to check for any leaks in plugged wells or naturally occurring seepages from beneath the sea floor. The company said the surveillance would continue Thursday and Friday. Shell estimates the sheen at six barrels of oil, or about 252 gallons.
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