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INITIAL RELEASE DDJC Tracy <br /> TABLE 2. Exposure Pathways (continued) <br /> Soiu'ce of Environmental Roue of Exposed <br /> Pathway Name Contamination Medium Point ofExpostue Exposure Populauat Comment <br /> Potential Ex osure Pethwa s <br /> DDJC Tracy TCE and PCE: Groundwater DDJC Tracy water Ingestion, DDJC Tracy Past: • <br /> water supply DDJC Tracy supply wells dermal contact, workers and Day • During the 1980s and early <br /> wells inhalation Care Center in the 1990s,the DDJC Tracy <br /> past(estimated WSW 4 was located in the <br /> 1,800 individuals) path of the VOC plume. <br /> •ATSDR concludes that <br /> WSW 4 was probably not-_ <br /> affected by contaminated_., <br /> groundwater and,therefore,- <br /> drinking water from WSW 4 <br /> most likely posed no public <br /> health hazard. <br /> Current and Future: <br /> •Well 4 has not been used <br /> for drinking water since it was <br /> closed in 1992.Active DDJC • <br /> Tracy WSWs 8 and 9 are <br /> upgradient to areas of <br /> contamination and are safe for <br /> drinking. <br /> 30 <br />