MILFORD – The post office was closed Tuesday as a hazardous materials team continued to clean up an oil spill in the building’s basement. Although the U.S. Postal Service building is on the Souhegan River in downtown Milford, none of the oil seemed to have gotten into the river, said Fred Elkind, the town’s environmental coordinator. Elkind said he heard that about 250 gallons of the fuel oil …
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