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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Analytical Report <br /> Client: EMCON Associates Date Received: 12118/92 <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/Cal,fomia DHS LUFT Method <br /> yg/L (ppb) <br /> Sample Name MW-1 (54) MW-2(531• MW-3 15M <br /> Date Analyzed 12124/92 12/24/92 12/24192 <br /> Analyte MRL <br /> • Benzene 05 3,500 2,500. 12.000 <br /> Toluene 0 5 410 1,500 5,500 <br /> Ethylbenzene 05 400 190 2,100 <br /> Total Xyienes 0 5 800 880 7,200 <br /> TPH as Gasoline 50 14,000 13,000 67,000 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Repornng Limit <br /> 40 <br /> Approved by: Date: <br /> 3 <br />