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COLUMBIA ANALYTICAL SERVICES. INC <br /> Analytical Report <br /> 40 Client EMCON Associates Date Received 10/13/92 <br /> Project EMCON Project No OG71-018 01 Work Order No SJ92-1268 <br /> ARCO Facility No 2093 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Vg/L (ppb) <br /> Sample Name ATR-11_[23) ATR-12 {241 Method Blank <br /> Date Analyzed 10/16/92 10116192 10/15/92 <br /> Analyte MRL <br /> Benzene 0 5 ND NO ND <br /> Toluene 0 5 NO NO NO <br /> Ethylbenzene 0 5 NO NO ND <br /> Total Xylenes 0 5 NO NO NO <br /> TPH as Gasoline 50 NO ND ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting hmrt <br /> Approved by Date: l Z3 Z <br /> t <br /> 5 <br /> 1921 Ringwood Avenue 9 Son Jose Coliforrno 95131 • Telephone 4081437 2400 • fox 4081437 9356 <br />