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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Analytical Report <br /> Client EMCON Associates Date Received- 07/14/92 <br /> Project EMCON Project No G71-18 01 Work Order# SJ92-0856 <br /> Arco Facility No 2093 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> pg/L (ppb) <br /> Sample Name ATR-5 (26) ATR 2 ATR-8 (24) <br /> Date Analyzed 07/17/92 07/17/92 07/17/92 <br /> Analyte MRL <br /> Benzene 05 ND ND 40 <br /> Toluene 05 ND ND ND <br /> Ethylbenzene 05 06 ND 9 2 <br /> Total Xylenes 05 ND ND 08 <br /> TPH as Gasoline 50 240 ` ND 87. <br /> TRH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> • Sample contains low and high boiling point hydrocarbons quantitated as gasoline The chromatogram <br /> does not match the typical gasoline fingerprint <br /> Approved by X��. Date 2 T, I l f – — <br /> 3 <br /> 1014 R nnwnnrf Aw-mils- 0 S— Inco Ce hfnrnin 911'14 • TPlonhnno An8fdl? 7dnn • Fnr AOA/d37 Plr5A <br />