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Geosyntec'-' <br /> conswtanrs <br /> North School East Commercial <br /> South Commercial/Residential West Residential <br /> • Summary of previous site investigations (if available/applicable): <br /> Tetrachloroethene (PCE) was released to the soil and groundwater through breaks in <br /> the sanitary sewer lines that serviced 3 historical dry cleaning businesses in the Lincoln <br /> Village Shopping Center. The primary constituents historically reported in the <br /> groundwater, soil and soil vapor at the site include PCE and the PCE degradation <br /> product trichloroethene (TCE). Other PCE degradation products have been detected at <br /> low levels in groundwater, including 1,2-dichloroethene (cis-1,2-DCE and trans-1,2- <br /> DCE) and vinyl chloride. <br /> PCE. The highest reported concentrations are 85 milligrams per liter (mg/1) in <br /> groundwater (May 1997); 63 milligrams per kilogram (mg/kg) in soils beneath the <br /> former Norge Cleaners (October 1987); and 160 mg/l in a sewage sample collected <br /> from manhole D (March 1985). <br /> TCE. The highest reported concentration is 0.91 mg/l in groundwater (November <br /> 1997); TCE has been detected in soil samples collected from Lincoln Center at low <br /> concentrations (maximum of 0.004 mg/kg). <br /> SAC 111 HASP-June 2023 5 6/23/2023 <br />