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COLUMBIA ANALYTICAL SERVICES. INC <br /> Analytical Report <br /> Client- EMCON Associates Date Received: 12/18/92 <br /> Project* EMCON Project No OG71-038 01 Service Request No : SJ92-1604 <br /> ARCO Facility No, 2168 Sample Matrix: water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Califomia DHS LOFT Method <br /> ug/L ippb) <br /> Sample Name Method Blank <br /> Date Analyzed 12/24/92 <br /> Analyte MRS <br /> Benzene 0 5 ND <br /> Toluene 0 5 ND <br /> Ethylbenzene 05 NO <br /> Total Xylenes 0 5 ND <br /> TPH as Gasoline 50 ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Umit <br /> ND None Detected at or above the method reporting limit <br /> Approved by: Date: <br /> 4 <br />