Unified Command works to contain sheen from derelict vessel near Camas, Wash.

The 431-foot barge, Davy Crocket, sits aground on the northern bank of the Columbia River near Camas, Wash., Thursday, Jan. 27, 2011. Photo by the Washington State Department of Ecology PORTLAND, Ore. — Federal, state and local agencies, as well as industry, continue to work closely together to recover oil and monitor a 431-foot derelict vessel, Davy Crockett, near Camas, Wash., on the Columbia River,...

Low levels of PCB detected in oil samples taken from derelict vessel near Camas, Wash.

The 431-foot barge, Davy Crocket, sits aground on the northern bank of the Columbia River near Camas, Wash., Thursday, Jan. 27, 2011. Photo by the Washington State Department of Ecology PORTLAND, Ore. — Follow up tests of oil samples taken from a 431-foot derelict vessel, Davy Crockett, have detected low levels of polychlorinated biphenyls (PCBs). Washington State Dept. of Ecology received reports...