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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 LUFT Method <br /> Ilg/L (ppb) <br /> Sample Name W-9 (78) W-10 (Tel W-11_(791 <br /> Date Analyzed 08/27/92 08/25/92 08/25/92 <br /> Analyte MRL <br /> Benzene 05 14 26 NO <br /> Toluene 05 ND ND ND <br /> Ethylbenzene 05 ND ND ND <br /> Total Xylenes 05 ND ND ND <br /> • TPH as Gasoline 50 ND 230 ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> Approved b Date �� �Z— <br /> pp Y <br /> 4 <br /> 1921 Ringwood Avenue • Son Jose Col,forno 95131 • Telephone 4081437-2400 • Fox 4081437-9356 <br />