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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 10/13/92 <br /> Project EMCON Project No OG71-018 01 Work Order No SJ92-1268 <br /> ARCO Facility No 2093 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> pg/L (ppb) <br /> Sample Name ATR-0 (241 ATR-9 ( 4) ATR-10 {241 <br /> Date Analyzed 10/16/92 10/16/92 10115192 <br /> Analyte MRL <br /> Benzene 05 78 ND ND <br /> Toluene 0 5 32 ND ND <br /> Ethylbenzene 05 11 ND ND <br /> Total Xylenes 05 8.8 ND ND <br /> TPH as Gasoline 50 140. ND ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Lima <br /> ND None Detected at or above the method reporting limit <br /> Approved by 14to <br /> 1L Date- 1 �- <br /> 4 <br /> 1921 Rinqwood Avenue • Son Jose Colifornio 95131 • Telephone 40$1437-2400 Fox 4081437-9356 <br />