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COLUMBIA ANALYTICAL SERVICES. INC <br /> Analytical Report <br /> Client EMCON Associates Date Received. 07/31/92 <br /> 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 /> pg/L (ppb) <br /> Sample Name BHD-1 (27) Method Blank Method Blank <br /> Date Analyzed 08/06/92 08/04/92 08/05/92 <br /> Analyle MRL <br /> Benzene 05 260 ND ND <br /> Toluene 05 21 ND ND <br /> Ethylbenzene 05 600 ND ND <br /> • Total Xylenes 05 510 ND ND <br /> TPH as Gasoline 50 8,100 NO ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting lima <br /> f Approved by Date <br /> 5 <br /> 1921 Ringwood Avenue • Son lose Colifomio 95131 • Telephone 4081407-2400 • fox 4081437-9356 <br />