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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 04/27/93 <br /> Project EMCON Project No OG71-017 01 Service Request No SJ93 0564 <br /> ARCO Facility No 434 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Ng/L (ppb) <br /> Sample Name W-12177'1 Method Blank <br /> Date Analyzed 05/03/93 05/03/93 <br /> Analyte MRL <br /> Benzene 0 5 NO NO <br /> Toluene 0 5 NO NO <br /> Ethylbenzene 0 5 NO NO <br /> Total Xylenes 0 5 ND ND <br /> TPH as Gasoline 50 NO 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 6 Date �y <br /> 2 <br /> 1921 Ringwood Avenue • Son Jose California 95131 • Telephone 4081437 2400 Fax 4081437 9356 <br />