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1 <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> i <br /> Client- ARCO Products Company Service Request: L9901978 <br /> Project WA#24406 0016020-Manteca Date Collected: NA <br /> LCS Matrix Soil Date Received: NA <br /> ' Date Extracted. NA <br /> Date Analyzed. 5/2/99 <br /> Laboratory Control Sample Summary <br /> ' BTEX and TPH as Gasoline <br /> Sample Name Lab Control Sample Units mg/Kg(ppm) <br /> Lab Code L990502-LCS Basis Wet <br /> ' Test Notes <br /> CAS <br /> Percent <br /> Recovery <br /> Prep Analysis True Percent Acceptance Result <br /> Analyte Method Method Value Result Recovery Limits Notes <br /> Benzene EPA 5030 8021B 00400 00436 109 39-150 <br /> Toluene EPA 5030 80218 00400 00484 121 46-148 <br /> Ethylbenzene EPA 5030 8021B 00400 00442 110 32-160 <br /> TPH as Gasoline EPA 5030 8015M 200 2 13 106 70-140 <br /> 1 <br /> Approved By Zi r- Date sly'q9LC1NWVUA ABI LCS 514/99 <br /> Pane No <br />