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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Analytical Report <br /> 0 Client: EMCON Associates Date Received: 12/08/92 <br /> Project: EMCON Project No. OG71-033.01 Service Request No.: SJ92-1544 <br /> ARCO Facility No. 548 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: MW-1 (556) MW-2 (61) MW-3 (62) <br /> Date Analyzed: 12/11/92 12/09/92 12/11192 j <br />• <br /> Analyle MRL <br /> Benzene 0.5 7.0 NO ND <br /> Toluene 0.5 NO NO NO <br /> Ethylbenzene 0.5 NO ND NO <br /> Total Xylenes 0.5 ND NO NO <br /> TPH as Gasoline 50 150. ' NO <150. *' <br /> I <br /> I <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> The sample contains a lower boiling point hydrocarbon mixture quantitated as gasoline. The <br /> chromatogram does not match the typical gasoline fingerprint. <br /> ** Raised MRL due to matrix interference. The sample contains a single non-fuel component <br /> eluting in the gasoline range. <br /> 00 <br /> ID Approved by: �� Date: dKfLM'1y_ �� Z <br />