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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 10/13/92 <br /> Project EMCON Project No OG71-018 01 Work Order No SJ92-1268 <br /> ARCO Facility No 2093 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> #g/L. (ppb) <br /> Sample Name ATR-5 1261 ATR-6 {261 ATR-7 (26) <br /> Date Analyzed 10/15/929 10/16/92 10/16/92 <br /> Analyte <br /> Benzene 0 5 ND ND ND <br /> Toluene 0 5 ND ND ND <br /> Ethylbenzene 0 5 ND ND ND <br /> Total Xylenes 0 5 ND ND ND <br /> TPH as Gasoline 50 160 ND ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> " This sample was part of the analytical batch started on October 15, 1992 However, rt was <br /> analyzed after midnight so the actual date analyzed is October 16, 1992 <br /> The sample contains components eluting in the gasoline range that were quantitated as <br /> gasoline The chromatogram does not match the typical gasoline fingerprint <br /> 0 <br /> Approved by Date rZ2192- <br /> 3 <br /> 21� Z <br /> 3 <br /> 1921 Rcngwood Avenue • Son Jose California 95131 • Telephone 408/437-2400 0 Fox 4081407 9356 <br />