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COLUMBIA ANALYTICAL. SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 05/28/93 <br /> Project EMCON Project No OG71-017 01 Service Request No SJ93-0719 <br /> ARCO Facility No 434 Sample Matrix Water <br /> BTEX and TPN as Gasoline <br /> EPA Methods 503018020/California DHS LUFT Method <br /> pg/L (ppb) <br /> Sample Name W-8 69 W-9 A81 W-10 1781 <br /> Date Analyzed 06/01/93 06101/93 06101/93 <br /> Analyte MRL <br /> • Benzene 0 5 ND ND NO <br /> Toluene 0 5 ND ND ND <br /> Ethylbenzene 0 5 ND ND ND <br /> Total Xylenes 0 5 NO ND ND <br /> TPH as Gasoline 50 NO ND ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting lima <br /> Approved by �L Date !� <br /> 4 <br /> 1921 Ringwood Avenue 9 5on Jose Colifornio 95131 • Telephone 4081407 2400 • fox 4081437 9356 <br />