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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report , <br /> 1 y <br /> Client EMCON Associates Date Received 05114192 - ; <br /> Project EMCON Project No G71-17 01 Work Order # SJ92-0606 <br /> Arco Facility No 434 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> Pg/L {ppb) <br /> Sample Name W-7 W-8169) W"9 1781 <br /> Date Analyzed 05121/92 05121/92 05/26/92 <br /> Analyte MRL <br /> Benzene 05 ND ND 14 <br /> Toluene 0 5 ND ND ND <br /> Ethylbenzene 0 5 ND ND ND <br /> Total Xylenes 05 ND ND ND <br /> TPH as Gasoline 50 70 ND 73 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> • Approved b %� J Date N� ?1 <br /> 4 <br /> 4014 0 ­wn-4 Avan a • f— 1—c (..ls.,...in OK4'1q • Ta1, nFKnna 40 AIA 17 ')Ann 4 Fnv AOA/417 014h � <br />