Toxic Plume Spreading At Bethpage Defense Plant, Tests ShowOfficials revealed this month that the 4.5-mile-by-3.5-mile plume of underground contamination in Bethpage is moving deeper than ever.
State Health Officials Conducting Cancer Study Near Old Long Island Dump SiteThe toxic plot is the result of years of dumping by the Grumman Corp. and the U.S. Navy and is believed to threaten the water supply to about 250,000 residents in Bethpage.

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