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USCG: No Deepwater Horizon oil in gulf

Oil shimmers on the surface of the Gulf of Mexico July 10, 2010, near a production well. BP is changing the device capturing oil from its leaking Deepwater Horizon well and plans to have a new, more efficient device in place in seven days, though in the meantime oil is gushing unchecked from the well. UPI/A.J. SiscoUPI/A.J. Sisco..
Oil shimmers on the surface of the Gulf of Mexico July 10, 2010, near a production well. BP is changing the device capturing oil from its leaking Deepwater Horizon well and plans to have a new, more efficient device in place in seven days, though in the meantime oil is gushing unchecked from the well. UPI/A.J. SiscoUPI/A.J. Sisco.. | License Photo

NEW ORLEANS, March 21 (UPI) -- A suspicious sheen on the water in the Gulf of Mexico is believed to contain sediment not oil from the Deepwater Horizon site, the U.S. Coast Guard announced.

The U.S. Coast Guard during the weekend responded to reports of possible oil pollution stretching into the Gulf of Mexico.

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Analyzed samples from the suspected sheen contained trace amounts of petroleum hydrocarbons, oil and grease, the Coast Guard said. The dark substance is believed to be the result of an increase in sediment that was agitated by dredging operations in the Mississippi River.

Additionally, the Coast Guard said it received notifications of possible pollution in coastal areas along the Gulf of Mexico.

"Samples have been taken from the shoreline impacts for testing but the oily substance is not, at this time, suspected to be residual oil from the Deepwater Horizon oil spill," the Coast Guard said.

The Deepwater Horizon oil platform caught fire and sank in the Gulf of Mexico in April, resulting in one of the worst oil spills in the history of the industry.

The Coast Guard said it deployed containment boom to the area as a precaution.

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