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404 WEST FREMONT STREET <br /> • WKA No 1628 04 <br /> May 18, 1995 <br /> Page 2 <br /> The samples were unmediately 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 using EPA test method 8015 modified, and Benzene, Toluene, Ethylbenzene and Total <br /> Xylenes (BTEX) using EPA test method 602 <br /> The submersible pump was cleaned with a solution of Lxqui-nox and water prior to purging each <br /> well to minimize the potential for cross-contamination All water removed during sampling and <br /> purging operations was placed in sealed and labeled 55-gallon drums and stored on site <br /> Analysis of water samples SMW2, MW5 and MW6 revealed no detectable concentrations of TPH <br /> or BTEX Concentrations of petroleum hydrocarbons were detected in the water samples from <br /> wells MW1, MW2, MW3 and MW4 A summary of analytical results for ground water samples <br /> obtained from the six on-site monitoring wells and one off-site monitoring well are included as <br /> Table 1, and also on Plate 3 Complete analytical reports and chain-of-custody documentation <br /> are included in the appendix <br /> The next quarter of ground water sampling is scheduled for June, 1995 Our report for next <br /> quarter will be transmitted upon completion of laboratory testing <br /> Wallace • Kuhl & Associates, Inc <br /> Richard Premzic <br /> Registered Geologist #5586 <br /> RP EH cb sdm <br /> Copy to Mr Steve Sasson, San Joaquin County <br /> Recycled paper WALLACE KUHL <br /> &ASSOCIATES INC <br />