Abstract
Pesticide production wastes were buried in shallow unlined trenches at a dump site in Hardeman County, Tennessee, from 1964 to 1972. By 1978, chlorinated solvents were observed to be contaminating nearby drinking water wells and residents were reporting a wide range of health problems. A brief history of these events is presented and two recent health studies are reviewed. In addition, a risk estimate is presented based on animal toxicity data. Exposure estimates are based on a groundwater model that predicts retrospective exposures prior to 1978, when domestic wells were abandoned, and from measurements and estimates of indoor air contamination from outgassing of the volatile organic chemicals identified in the ground water. The implications of this risk assessment are discussed in the context of the results of the health studies.
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