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COLUMBIA ANALYTICAL SERVICES. INC <br /> Analytical Report <br /> Client EMCON Associates Date Received. 04/23/92 <br /> Project EMCON Project No G71-18 01 Work Order # S 92-0489 <br /> Arco Facility No 2093 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> pg/L (ppb) <br /> Sample Name ATR-12(24) Method Blank <br /> Date Analyzed 04/27/92 04/27/92 <br /> Analyte MRL <br /> Benzene 0 5 ND ND <br /> Toluene 0 5 ND ND <br /> Ethylbenzene 0 5 ND ND <br /> Total Xylenes 0 5 ND ND <br /> TPH as Gasoline 50 ND ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> • Approved by til Date (tII <br /> 5 <br /> 1921 Rinowood Avenue • Son Jose Colifornio 95131 • Teleohone 4081437 2400 • Fox 4081437 9356 <br />