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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 08/20/92 <br /> Prosect EMCON Project No G71-17 01- Work Order #. SJ92-1049 <br /> Arco Facility No 434 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/DHS LUFT Method <br /> Ng/L (ppb) <br /> Sample Name Method Blank <br /> Date Analyzed 08/27/92 <br /> Analyle MRL <br /> Benzene 0 5 NO <br /> Toluene 0 5 NO <br /> Ethylbenzene 0 5 ND <br /> Total Xylenes 0 5 ND <br /> • TPH as Gasoline 50 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 <br /> Date <br /> App <br /> 6 <br /> 1921 Ringwood Avenue • Son Jose Cagfornto 95131 • Telephone 4081437-2400 • Fox 4081407-9056 <br />