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781 SWIFT WAY <br /> WKA No 1735 02 <br /> • February 5, 1996 <br /> Page 2 <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 MWI through MW6 Analytical results of <br /> water sample MWI revealed a TPH as diesel concentration of 80 µg1f, TPH as gasoline and <br /> BTEX constituents were not detected Analytical results of water samples MW2 through MW6 <br /> revealed no detectable concentrations of TPH as gasoline, TPH as diesel or BTEX Analytical <br /> results for the ground water samples obtained from the six on-site monitoring wells are <br /> summarized in Table 2 Complete analytical results and chain-of-custody documentation are <br /> included in the appendix <br /> The next quarter of ground water sampling Is scheduled for April, 1996 Our next quarterly <br /> report will be transmitted upon completion of laboratory testing Please call if you have any <br /> questions regarding this report <br /> Wallace ■ K hl & Associates, Inc <br /> C <br /> Ku Balasek <br /> S nior Hydrogeologist <br /> KMB EJH sdm cb <br /> Copy to Michael Infurna, San Joaquin County Public Health Services <br /> KU"uns-oz Qw <br /> `O% <br /> WALLACE•KUHL <br /> Aeryckdpapc> &ASSOCIATES INC <br />