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COLUMBIA ANALYTICAL SERVICES. INC. <br /> Analytical Report <br />. Client EMCON Associates Date Received: 04/30/93 <br /> Project EMCON Project No OG71-019 01 Service Request No SJ93-0591 <br /> ARCO Facility No 2133 Sample Matrix- Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> 11g/L (ppb) <br /> Sample Name PR-1 (27) PR-2 (27) BHD-1 (271 <br /> Date Analyzed 05112/93 05112/93 05/11/93 <br /> Analyte MRL <br /> Benzene 05 ND ND 340. <br /> Toluene 0 5 NO ND t20. <br /> Ethylbenzene 05 ND ND 610 <br /> Total Xylenes 05 ND NO 460. <br /> TPH as Gasoline 50 NO ND 7,000. <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> m This sample was part of the analytical batch started on May 11, 1993 However, rt was <br /> analyzed after midnight so the actual date analyzed is May 12, 1993 <br /> o. Rased MRL due to high analyte concentration requiring sample dilution <br /> Approved by IMW4Date 11hV14 <br /> 2 <br /> 1921 Rinowood Avenue • Son Jose Colifornro 95131 • Teleoho-ke 4081437 2400 + Fox 408/437-9356 <br />