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781 SWIFT WAY <br /> WKA No 1735 02 <br /> 46 June 18, 1996 <br /> Page 2 <br /> temperature, pH, and conductivity readings stabilized and/or the water cleared of sediment The <br /> water samples were then collected using a new polyethylene disposable bailer Water from the <br /> disposable bailer was decanted into appropriate sample containers provided by the laboratory <br /> The samples were immediately placed in an ice-chest with ice and submitted under chain-of- <br /> custody to a California-certified laboratory for analysis of Total Petroleum Hydrocarbons (TPH) <br /> as gasoline and diesel using Modified EPA test method 8015, and Benzene, Toluene, <br /> Ethylbenzene and Total Xylenes (BTEX) using EPA test method 602 <br /> The two-inch diameter submersible pump was cleaned with a solution of Liqui-nox and water <br /> prior to purging each well to minimize the potential for cross-contamination All water removed <br /> during sampling and purging operations was placed in sealed and labeled 55-gallon drums and <br /> stored on site <br /> No free product was observed in monitoring wells MW 1 through MW6 Analytical results of <br /> water sample MW1, MW4 and MW6 revealed no detectable concentrations of TPH as diesel, <br /> TPH as gasoline, or BTEX Analytical results for the groundwater samples obtained from the <br /> three on-site monitoring wells are summarized in Table 2 Complete analytical results and chain- <br /> of-custody documentation are included in the appendix <br /> The next quarter of ground water sampling is scheduled for July, 1996 Our next quarterly <br /> report will be transmitted upon completion of Iaboratory testing Please call if you have any <br /> questions regarding this report <br /> Wallace ■ Kuhl & Asso tes, Inc <br /> XK rt Balaseknior Hydrogeologlst <br />• KMB sdm <br /> Copy to Michael Infurna San Joaquin County Public Health Services V <br /> N <br /> K V VMM 735-02 Q l l <br /> WALLACE•KUHL <br /> Recycled paper 6 ASSOCIATES INC <br />