Crews are preparing to begin a sixth and final season of PCB dredging along the upper-Hudson River.
Regional Environmental Protection Agency administrator Judith Enck says this is an important year in the history of the river. Work on the estimated $2 billion cleanup was expected to start Thursday afternoon. The season typically runs into the fall.
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GE discharged polychlorinated biphenyls into the river decades ago when they were used as coolants in electrical equipment.
Flood plain work, habitat reconstruction along the river and long-term monitoring will continue after dredging is finished.
Also, federal Natural Resources Trustees will make an assessment of the harm done to the river's resources, either through a settlement with Fairfield, Connecticut-based GE over its liability or through litigation.