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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 08/20/92 <br /> Project EMCON Project No G71-17 01 Work Order # SJ92-1049 <br /> Arco Facility No 434 Sample Matrix Water <br /> BTEX and TPH as Gasoline T <br /> EPA Methods 5030/8020/DHS LUFf Method <br /> Vg/L (ppb) <br /> Sample Name W-1A (76) W-3 168) W-5 (69) <br /> Date Analyzed 08/25/92 08/25/92 08/25/92 <br /> Analyte MRL <br /> Benzene 0 5 6 5 210 ND <br /> Toluene 05 ND <5 • ND <br /> Ethylbenzene 05 ND as ND <br /> Total Xylenes 05 ND <5 ` ND <br /> • TPH as Gasoline 50 140. 1,200 ND <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 w''ft Date„ filS2-- <br /> 2 <br /> 1921 Ringwood Avenue • Son lose Col,forno 95131 • Telephone 408/407-2400 Fox 408/437-9356 <br />