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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Analytical Report <br /> Client: EMCON Associates Date Received: 09/09/92 <br /> Project: EMCON Project No. G71-33.01 Work Order #: SJ92-1126 <br />• Arco Facility No. 548 Sample Matrix: Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> ug[L (ppb) <br />• <br /> Sample Name: MW-1 (56) MW-2 (60) MW-3 (62) <br /> Date Analyzed: 09114/92 09/10192 09/10/92 <br /> Analyte MRL <br /> Benzene 0.5 8.7 ND ND <br /> Toluene 0.5 <1.0 ND ND <br />. Ethylbenzene 0.5 <1.* ND ND <br /> Total Xylenes 0.5 <1.* ND ND <br /> TPH as Gasoline 50 260. ND <73.** <br />• y I, <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br />• ND done Detected at or above the method reporting limit <br /> ' Raised MRL due to high analyte concentration requiring sample dilution. <br /> ** Raised MRL due to matrix interference. This sample contains a single non-fuel component. <br />• <br />• <br /> Approved by ")AP L Date <br />• <br /> 2 <br />