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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received. 01/23/92 <br /> Project EMCON Project No G71-19 01 Work Order # SJ92-0086 <br /> Arco Facility No 2133 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> /rg/L (ppb) <br /> Sample Name E-11 2 E-12 (22 5) Method Blank <br /> Date Analyzed 01/29192 01/27/92 01/27/92 <br /> Analyle MRL <br /> Benzene 0 5 220 2 9 ND <br /> Toluene 0 5 <14 • <2 5' ND <br /> Ethylbenzene 0 5 64 1 3 ND <br /> Total Xylenes 0 5 120 0 8 ND <br /> TPH as Gasoline 50 6,200 630 ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> ' Raised MRL due to matrix interference <br /> Approved by 14 Date <br /> 5 <br /> 1921 Ringwood Avenue • Son lose California 95131 Telephone 4081437 2400 Fax 4081437 9356 <br />