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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 08/20/92 <br /> Project EMCON Project No G71-17 01 Work Order # - SJ92-1049 - <br /> Arco Facility No 434 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFf Method <br /> pg/L. (ppb) <br /> Sample Name W-6 W-,7 1691 W-8 (68) <br /> Date Analyzed 08125/92 08/25/92 08/25/92 <br /> Analyte MRL <br /> Benzene 0 5 ND ND ND <br /> Toluene 05 ND ND ND <br /> Ethylbenzene 0 5 ND ND ND <br /> Total Xylenes 05 ND ND ND <br /> • TPH as Gasoline 50 ND 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 Ai�v 04-1 <br /> Date <br /> 3 <br /> 1921 Ringwood Avenue • Son lose Colifornlo 95131 • Telephone 4081437-2400 • Fox 408/437-9356 <br />