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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client ARCO Products Company Service Request L9901977 <br /> Protect WA4 24406 00/6020-Manteca Date Collected. NA <br /> LCS Matrix: Soil Date Received: NA <br /> Date Extracted: NA e <br /> Date Analyzed 512199 <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 8021B 00400 00494 121 46-148 <br /> Ethylbenzene EPA 5030 8021B 00400 00442 110 32-160 - <br /> TPH as Gasoline EPA 5030 8015M - 200 213 106 70-140 <br /> 1 <br /> Approved By <br /> �� f Date s'Iy I9 9 <br /> L <br /> 0197797p <br /> Piga No e <br /> 1977V01{.ARI-LCS(2)941" <br />