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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 07/31/92 <br /> IS Project EMCON Project No G71-19 01 Work Order # SJ92-0945 <br /> Arco Facility No 2133 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LOFT Method <br /> Ngo (ppb) <br /> Sample Name Method Blank <br /> Date Analyzed 08/06/92 <br /> Analyte MRL <br /> Benzene 05 ND <br /> Toluene 05 ND <br /> Ethylbenzene 05 ND <br /> • Total Xylenes 05 ND <br /> TPH as Gasoline 50 ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> • 9 <br /> Approved by4'. u Date <br /> 6 <br /> 1921 Ringwood Avenue • Son Jose California 95131 • Telephone 4081437-2400 Fox 4081437-9356 <br />