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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 # SJ92-0098 <br /> Arco Facility No 2093 Sample Matrix: Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030!8020/DHS LUFT Method <br /> ug/L Ippbf <br /> Sample Name ATR-12 (24) ATR-8 124! ATR- <br /> Date Analyzed: 01/29/92 01/29192 01129/92 <br /> Analyte MRL <br /> Benzene 0 5 NO 2.5 1 4 <br /> Toluene 0 5 NO NO NO <br /> Ethylbenzene 0 5 NO NO 1 5 <br /> Total Xylenes 0 5 ND NO 06 <br /> TPH as Gasoline 50 NO NO 180• <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> NO None Detected at or above the method reporting limit <br />• <br /> Approved by 41114 Date <br /> 4 <br /> 1921 Ringwood Avenue • Son Jose Colifornio 95131 Telephone 408/437 2400 Fox 408/437 9356 <br />