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COLUMBIA ANALYTICAL SERVICES. INC <br /> Analytical Report <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 5030/8020/California DHS LUFT Method <br /> pg/L (ppb) <br /> Sample Name ATR-1 (26) ATR-2 (29) ATR-4 (28) <br /> Date Analyzed 04/23/93 04/23/93 04/23/93 <br /> Analyte MRL <br /> • Benzene 0 5 ND 3 8 160. <br /> Toluene 0 5 NO 07 42 <br /> Ethylbenzene 0 5 1 5 08 47 <br /> Total Xylenes 0 5 ND 1 9 63. <br /> TPH as Gasoline 50 NO 55 810 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> 99 <br /> Approved by Date Z <br /> I ? <br /> 2 <br /> 1921 Ringwood Avenue • Son Jose California 95131 • Telephone 4081437-2400 • Fox 4081437-9356 <br />