A recent landmark Superfund settlement in New Bedford may not be enough to scrub all the probable human carcinogens from the toxic harbor, local environmental groups warn. The federal government negotiated a $366 million cash settlement last week from the owners of a former electronics plant that leaked tons of polychlorinated biphenyls, or PCBs, into the Acushnet River and harbor. The money, U.S. Environmental Protection Agency officials say, will provide the bulk of funding to get the harbor glistening within seven years.
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