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COLUMBIA ANALYTICAL SERVICES. INC <br /> Analytical Report <br /> Client- EMCON Associates Date Received: 01/29/92 <br /> Project EMCON Project No G71-18 01 Work Order 9 SJ92-0098 <br /> Arco Facility No 2093 Sample Matrix. Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/80201DHS LUFT Method <br /> pg1L (ppb) <br /> Sample Name ATR-1 (26) ATR-2 1291 ATR-6 (261 <br /> Date Analyzed 01/29/92 01/29/92 01/29/92 <br /> A_ngWe MRL <br /> Benzene 0 5 NO NO ND <br /> Toluene 05 ND NO NO <br /> Ethylbenzene 0.5 ND NO NO <br /> Total Xylenes 0 5 ND ND NO <br /> TPH as Gasoline 50 ND ND ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Urnit <br /> NO None Detected at or above the method reporting limit <br /> • <br /> Approved by Date <br /> 2 <br /> 1921 Ringwood Avenue 0 Son Jose Coiifornro 95131 • Telephone 4081437 2400 • Fax 4081437-9356 <br />