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COLUMBIA ANALYTICAL SERVICES,INC. <br /> 1 QA/QC Report <br /> `5 <br /> Client- ARCO Products Company Service Request. L9901978 <br /> Protect: WA#24406 0016020-Manteca Date Collected: NA <br /> LCS Matrix: water Date Received: NA <br /> Date Digested: 5/3199 <br /> Date Analyzed- 513199 <br /> Laboratory Control Sample Summary <br /> 1Lead,Total <br /> Sample Name Lab Control Sample Units mg/L(ppm) <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 /> Lead Total EPA 3050B 6010E 0 500 0 489 98 75-125 <br /> I <br /> Approved By Date <br /> LC�1ARARM LCS 5/409 Page No <br />