Health Assessment for Sturgis Municipal Wells, St. Joseph County, Michigan, Region 5. CERCLIS No. MID980703011

摘要

The Sturgis Municipal Wells are listed on the National Priorities List. Routine sampling in June 1982 revealed that two of the four municipal water supply wells serving the City of Sturgis (pop. 10,000) were contaminated with trichloroethylene (TCE) and perchloroethylene (PCE). TCE concentrations ranging from 11-74 ppb were detected in both wells. Twenty-eight water samples were taken from existing wells (monitoring, test and production wells) in fall 1987. An industrial process well at Ross Laboratories contained 219 ppb TCE. Soil gas sampling, also performed in fall 1987, revealed several hot spots throughout the city. The following compounds were detected (maximum concentrations in ng/l): TCE, 47,200; PCE, 290,000; 1,1-dichloroethane, 2,040; 1,2-dichloroethane, 1,092; 1,1,1-trichloroethane, 23,600; and toluene; 3,680. The site is of public health concern because of the risk to human health caused by probable human exposure to hazardous substances at levels that may result in adverse human health effects over time. Human exposure to TCE has and is probably occurring via contaminated groundwater, and potentially through surface water, soils, and air.