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COLUMBIA ANALYTICAL SERVICES INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 11/03/92 <br /> Project EMCON Project No OG71-019 01 Work Order No SJ92-1367 <br /> ARCO Facility No 2133 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DHS LUFT Method <br /> ,ug/L (ppb) <br /> Sample Name E-11 23 E-12 (22) Method Blank <br /> Date Analyzed 11/10/92 11/10/92 11/06/92 <br /> Analyte MRL <br /> Benzene 0 5 390 6 7 NO <br /> Toluene 0 5 <20 NO NO <br /> Ethylbenzene 0 5 68 1 3 ND <br /> Total Xylenes 0 5 150 2 7 NO <br /> TPH as Gasoline 50 6,600 400 NO <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> NO None Detected at or above the method reporting limit <br /> Raised MRL due to high analyte concentration requiring sample dilution <br /> Approved by Date �- <br /> 5 <br />