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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 01/23/92 <br /> Protect EMCON Project No G71-19 01 Work Order # SJ92-0086 <br /> Arco Facility No 2133 Sample Matrix Water <br /> STEX and TPH as Gasoline <br /> EPA Methods 5030/80201DHS LUFT Method <br /> ,ugIL (Ppb) <br /> Sample Name BHD-2 28 E-2 21 E-4 21 <br /> Date Analyzed 01/27/92 01/28/92 01/28/92 <br /> Analyte MRL <br /> Benzene 0 5 NO 41 1,100 <br /> Toluene 05 ND 22 10 <br /> Ethylbenzene 0 5 ND 14 140 <br /> Total Xylenes 0 5 NO 47 220 <br /> TPH as Gasoline 50 NO 2,400 8,500 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> Approved by L <br /> G ti Date ALL O 3e <br /> 3 <br /> 1921 Ringwood Avenue • Son lose California 95131 • Telephone 4081437 2400 • Fox 4081437 9356 <br />