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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 PR-1 (27) PR-2 (27) BHD-1 27 <br /> Date Analyzed 11/06/92 11/06/92 11/10/92 <br /> Analyte MRL <br /> • Benzene 0 5 ND ND 80 <br /> Toluene 0 5 ND ND <2 5 • <br /> Ethylbenzene 0 5 ND ND 110 <br /> Total Xylenes 0 5 ND ND 17 <br /> TPH as Gasoline 50 ND ND 1,800 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND 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 /> 2 <br />