FILE - This July 4, 2011 file photo shows Jim Swanson surveying the oil impact on his property in Laurel, Mont. Swanson had contacted the DEQ after seeing oil sheens along the river. His property suffered extensive contamination last year that Exxon workers attempted to remove as part of an estimated $135 million cleanup and repair job. (AP Photo/Jim Urquhart, File)

Associated Press
FILE - This July 4, 2011 file photo shows Jim Swanson surveying the oil impact on his property in Laurel, Mont. Swanson had contacted the DEQ after seeing oil sheens along the river. His property suffered extensive contamination last year that Exxon workers attempted to remove as part of an estimated $135 million cleanup and repair job.  (AP Photo/Jim Urquhart, File)
FILE - This July 4, 2011 file photo shows Jim Swanson surveying the oil impact on his property in Laurel, Mont. Swanson had contacted the DEQ after seeing oil sheens along the river. His property suffered extensive contamination last year that Exxon workers attempted to remove as part of an estimated $135 million cleanup and repair job. (AP Photo/Jim Urquhart, File)
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