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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> i <br /> Client- EMCON Associates Date Received 04/16/93 <br /> Project EMCON Project No OG71-018 01 Service Request No SJ93-0521 <br /> ARCO Facility No 2093 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DHS LOFT Method <br /> pg/L (ppb) <br /> Sample Name ATR-5 (26) ATR-6 (26) ATR-7 [261 <br /> Date Analyzed 04/26/93 04/23/93 04123/93 <br /> Analyte MRL <br /> Benzene 0 5 1 5 75 2 9 <br /> Toluene 0 5 ND NO NO <br /> Ethylbenzene 0 5 83 NO NO <br /> Total Xylenes 05 09 ND ND <br /> TPH as Gasoline 50 810 310 ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> Approved by Date- Z <br /> 3 <br /> 1921 Ringwood Avenue • Son Jose California 95131 9 Telephone 408/407-2400 • Fox 408/437-4356 <br />