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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client- ARCO Products Company Service Request: L9901977 <br /> Protect- WAN 24406 00/6020-Manteca Date Collected. NA <br /> LCS Matrix Soil Date Received: NA <br />' Date Extracted* NA <br /> Date Analyzed 513199 <br /> Laboratory Control Sample Summary <br /> BTEX and TPH as Gasoline <br /> Sample Name Lab Control Sample Units mg/Kg(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 /> Benzene EPA 5030 8021B 00400 00434 108 39-150 <br /> Toluene EPA 5030 8021B 00400 00436 109 46-148 <br /> Ethylbenzene EPA 5030 8021B 00400 00444 ill 32-160 <br /> TPH as Gasoline EPA 5030 8015M 200 215 108 70-140 <br /> Approved By Date s/`f A7 <br />' e xo <br /> 61977VOH A61-LC$5/4I99 <br />