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ALBANY, N.Y. (AP) — The U.S. Environmental Protection Agency says it needs to finish a review of a $1.7 billion Superfund cleanup of the Hudson River before declaring whether the job was completed properly.

The EPA told General Electric Co. in a letter Tuesday it expects to finalize its review early this year. Boston-based GE asked for a “certificate of completion” a year ago and the agency was obliged to respond by Wednesday.

GE completed removal of 2.75 million cubic yards (2.1 million cubic meters) of polychlorinated biphenyl-contaminated sediment from the river in 2015.

The EPA has said that, based on existing data, it does not appear as though more dredging is needed.

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New York state officials and other critics pushing for a broader cleanup say too much PCB-contaminated sediment remains in the river.