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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 04/30/93 <br /> Project EMCON Project No OG71-019 01 Service Request No . SJ93-0591 <br /> ARCO Facility No 2133 Sample Matrix Water <br /> BTFX and TPH as Gasoline <br /> EPA Methods 503018020/California-OHS LUFT Method <br /> prg/L (ppb) <br /> Sample Name Method Blank MeLthod BlankMethod Blank <br /> Date Analyzed 05/11/93 05/12/93 _ 05/13/93 <br /> Analyte MRL <br /> Benzene 05 ND NO ND <br /> Toluene 05 ND ND NO <br /> Ethylbenzene 05 ND ND ND <br /> Total Xylenes 0 5 ND ND ND <br /> TPN as Gasoline 50 ND ND ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> Approved by Date Ar,V 14 <br /> 7 <br /> 1921 Ringwood Avenue • Son Jose Colifornio 95131 • Telephone 408/437-2400 • Fox 408/437 9356 <br />