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INITIAL RELEASE DDJC Tracy private wells in the area has not detected VOCs at levels associated with adverse health effects. DDJC Tracy constructed a groundwater treatment system that is expected to minimize transport off site and clean up the plume to EPA and/or CA MCLS for TCE, PCE, and 1,1-DCE. Therefore, no exposure is currently occurring via private well water at levels associated with health hazards, nor is future exposure above the MCLS expected to occur. Municipal water supply is safe to drink. The city of Tracy's drinking water supply is served by 10 deep aquifer wells, none of which are located in or near the plume or have been affected by site-related contamination. 2. On-site surface soil poses no apparent public health hazards to on-site workers or visitors, or to children playing in the Day Care Center play yard. DDJC Tracy evaluated contaminant concentrations in areas of exposed soil along the boundary of the site where workers or visitors may access them and in the Day Care Center yard where children play. ATSDR determined that soil contaminant concentrations in the exposed areas of the site and in the Day Care Center play yard are too low to pose a health hazard. Although some areas of the site under investigation contain contaminated media, workers and the general public are prevented from accessing these areas with any frequency or duration. 3. Ingestion of locally grown commercial produce or home-grown vegetables pose no apparent public health hazards to individuals consuming these foods. Three agricultural wells located in or near the plume were used to irrigate commercial crops in the past. During monitoring between 1987 and 1991, TCE and PCE were detected in two of the wells at levels above ATSDR's CREG and above EPA and CA MCLS. Because VOCs at levels slightly above the MCLS are not expected to appreciably accumulate in nuts, fruits, or vegetables grown in the area, ATSDR does not anticipate this pathway to pose a health hazard. The three agricultural wells in or near the plume were closed by 1995. Therefore, no exposure is currently occurring or is expected to occur in the future through this pathway. 4. Fish in the on-site stormwater lagoon poses no past health hazards to individuals who consumed fish in the past. Water from the stormwater system and from DDJC Tracy water supply well 4 (located in the plume) filled the lagoon, which was fished until 1992, when DDJC Tracy removed all fish from the lagoon. In the absence of fish sampling, ATSDR reviewed the sediment data collected for the lagoon and determined that lagoon fish were unlikely to accumulate contaminants, if any, at levels known to cause health hazards to people who ate the fish in the past. The lagoon does not contain any fish and DDJC Tracy has not developed plans to restock the lagoon; therefore, exposure is not occurring nor is it expected to occur in the future. 19