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File No 20-3759-01 k" KLEINFELDER
<br /> December 14, 1995
<br /> LABORATORY ANALYSIS
<br /> The groundwater samples from monitoring wells MW-1, MW-2, and MW-3 were labeled and
<br /> placed in an iced sample container The samples were transported by the field personnel to the
<br /> Klemfelder office in Stockton and then transported by couner in a sealed container to Sequoia
<br /> Analytical in Sacramento, California Sequoia Analytical is certified by the State of Califorrua
<br /> Department of Toxic Substance Control for the analyses performed The samples were transported
<br /> under chain-of-custody documentation
<br /> The groundwater samples were analyzed for
<br /> + Total Petroleum Hydrocarbons Purgeable (Gasoline Range) by EPA Method 8015M/5030
<br /> [TPH-G]
<br /> • Benzene,Toluene, Ethylbenzene, and Total Xylenes by EPA Method 8020/5030 [BTEX]
<br /> • Total Petroleum Hydrocarbons Extractable (Kerosene Range) by EPA Method 3510/8015
<br /> Modified [717PH-K]
<br /> Total Petroleum Hydrocarbons as referenced to gasoline [TPH-G] were detected in monitoring
<br /> t wells MW-1, MW-2, and MW-3 at the concentrations of 400 µg11, 3,500 41, and 840 µg/1,
<br /> respectively Benzene, Toluene, Ethylbenzene, and Total Xylenes were also detected in
<br /> groundwater beneath the subject site Benzene was reported in MW-1, MW-2, and MW-3 at
<br /> concentrations of 46 µg/l, 2,100 µg11, and 11 µg11, respectively Toluene was reported in MW-2 at
<br /> i4,200 µg/1 Ethylbenzene was detected in MW-1, MW-2, and MW-3 at concentrations of 15 µg/1,
<br /> 1,000 µg11, and 30 µg/l, respectively Total Xylenes were also reported in MW-1, MW-2, and
<br /> MW-3 at concentrations of 13 µg/1, 3,500 µg/1, and 12 µg11, respectively Total Petroleum
<br /> Hydrocarbons extractable (Fuel Fingerprint Analyses) were not identifiable in monitoring wells
<br /> MW-1, MW-2, and MW-3 in the following categories JP-4, JP-5, Kerosene, Diesel, and
<br /> Lubricating Oil However, Unidentifiable Extractable Hydrocarbons were reported in monitoring
<br /> wells MW-1, MW-2, and MW-3, at concentrations of 290 µg/1 (>C9 range), 5,500 µg/1, (<C14
<br /> range), and 470 µg/1(>C9 range), respectively
<br /> For additional mformation regarding the analytical results for the groundwater samples obtained
<br /> from wells MW-1, MW-2, and MW-3, please refer to the chain-of-custody and laboratory data
<br /> sheets in Appendix B
<br /> CONCLUSIONS
<br /> Klemfelder recommends that a copy of this report be submitted to the State of California Regional
<br /> Water Quality Control Board (RWQCB) and the San Joaquin County Public Health Services
<br /> Department Environmental Health Division(PHS/EHD) for their review and consideration
<br /> J
<br /> Af?950043 Paige 3 of 4 01995,Kleinfelder,Inc
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