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i6- v �Tc 2N ~ ass0CIATeS INC . ! rZ PYM L. and MW6 contained no detectable concentrations of TPHd, TPHg, BTEX, or MTBE. The soil sample collected from boring MW6 contained non-detectable to background concentrations of total lead. Analytical results of soil samples are summarized in Table 1. Laboratory data sheets �- and chain-of-custody documentation is presented in Appendix B. 4`2 Groundwater Analytical Results The grab groundwater samples collected from borings SBB, SB9, and SB10 contained no detectable concentrations of TPHd, TPHg, BTEX, or oxygenate fuel additives. The grab `r groundwater samples collected from boring SB 12 contained no detectable concentrations of TPHd, TPHg, benzene, ethyl benzene, xylenes, or MTBE but did contain trace amounts of toluene. Y The groundwater samples collected from wells MW1, MWS, and MW6 contained no detectable concentrations of TPHd, TPHg, BTEX, MTBE, and/or oxygenate fuel additives. The groundwater sample collected from well MW3 contained no detectable concentrations of TPHg, BTEX, or MTBE, but did contain a low concentration of TPHd. The groundwater samples �. collected from wells MW2 and MW4 contained no detectable concentrations of benzene, toluene, ethylbenzene, or MTBE. The groundwater samples from wells MW2 'and MW4 contained low concentrations of xylenes, detectable concentrations of TPHg, and elevated concentrations of TPHd. Analytical results of groundwater samples are summarized in Table 2. Laboratory data sheets and chain-of-custody documentation for groundwater samples are contained in Appendix C. 5.0 RECEPTOR SURVEY ATC performed a well survey for the site at the request of PHS/EHD. ATC reviewed 3 groundwater well construction logs on file at the Department of Water Resources (DWR) in Sacramento, California, conducted a site walk in the vicinity of the site, and contacted the City of Stockton and California Water Service to identify any groundwater wells located within a 2,000- foot radius of the site. Mr. Eric Mar of California Water Service indicated that California Water Service has no wells within one mile of the site. Mr. Ed Formosa with the City of Stockton Public Works Department indicated that the City of Stockton has no wells within one mile of the site. The search revealed eight wells located within approximately 2,000 feet of the site. The wells Lo located cl s the site are approximately 400 feet southwest of the site. The well locations are shown o Figure 4. The wells were located on the map according to "well location" description information provided r on the well construction logs or observations made during the site walk. Available well wA54.625001reportslsumiii.doc 7 V