An Environmental Protection Agency investigation of the Superfund site occupied by the former Olin Chemical facility in Wilmington, Mass., has turned up a nearly three-quarter-mile plume of contamination by almost 200 chemicals. Much of the contamination was present before Olin bought the site, EPA officials said. No research so far has linked the tainted groundwater with a cluster of cancers detected in children starting in 1987. The state's Department of Public Health is nearing completion of a 14-year-old study examining whether contamination from the Olin site and a former landfill are connected to the nearly two-dozen cancer cases.
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