“The sheen, located about 50 miles off Louisiana’s shore in the Mississippi Canyon block 252 where the Macondo well was drilled, was detected in satellite images taken on Sept. 9 and Sept. 14. The Coast Guard said the size of the sheen has varied with weather conditions.
Samples of the crude were collected and sent to a Coast Guard laboratory in New London, Conn. On Tuesday, the Coast Guard told BP and Transocean, owner and operator of the Deepwater Horizon drilling rig that caught fire and sank, that the oil from the sheen and spill matched.
In a meeting Wednesday, the Coast Guard told the companies to come up with a plan of action for determining the source. “No one’s 100 percent as to where it’s coming from,” said Frank Csulak, scientific support coordinator for the National Oceanic and Atmospheric Administration.
Since the disaster in 2010, which killed 11 workers, the wreckage of the massive rig, the crumpled riser and some hardware used in the attempt to kill the well have remained on the gulf floor.”