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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 02/13/92 <br /> Project EMCON Project No G71-17 01 Work Order # SJ92-0154 <br /> Arco Facility No 434 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> jug/l- (Ppb! <br /> Sample Name W-9 78) .W-3- L) W-1 7 <br /> Date Analyzed 02/14/92 02/14/92 02/14/92 <br /> Analyte MRL <br /> Benzene 0 5 180 480 15 <br /> Toluene 05 <1 ' 210 <1 ' <br /> Ethylbenzene 0 5 <1 ' 22 <1 ' <br /> Total Xylenes 0 5 <1 ' 490 <1 ' <br /> TPH as Gasoline 50 430 4,100 360 <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 high analyte concentration requiring sample dilution <br /> • <br /> Approved by Date <br /> 5 <br />