BOSTON, Massachusetts, Aug. 8 -- The Environmental Protection Agency issued the following news release: The U.S. Environmental Protection Agency (EPA), in consultation with the State of Massachusetts, has selected a final plan to cleanup groundwater contamination at the Nyanza Chemical Waste Dump Superfund Site, Operable Unit 2, located in Ashland. The selected remedy is intended to reduce the concentration of contaminants in groundwater to levels that will be protective of human health for ex  more