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j <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client ARCO Products Company Service Request: L9901977 <br /> Project- WAN 24406 00/6020-Manteca Date Collected. NA <br /> LCS Matrix Soil Date Received, NA <br /> Date Extracted: NA <br /> Date Analyzed- 513/99 <br /> Laboratory Control Sample Summary <br /> Oxygenates <br /> Sample Name Lab Control Sample Umts ug/Kg(ppb) <br /> Lab Code L990503-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 8260 200 200 100 70-130 <br /> Toluene EPA 5030 8260 200 206 103 70-130 <br /> 1 Ethylbenzene EPA 5030 8260 200 203 101 70-130 <br /> 1 <br /> I <br /> 1 <br /> 1 <br /> Approved By Date r�`FI1 <br /> LCS/020597p No <br /> 019TN .H <br /> OAW!-LCS(4)5I4N9 <br />