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t., <br /> COLUMBIA ANALYTICAL SERVICES.INC. <br /> QA/QC Report <br /> Client: ARCO Products Company Service Request: S9601539 <br /> Project 2130 Stockton/#21775-229 0021TO#19350 00 Date Analyzed: 9/30196 <br /> Initial Calibration Verification(ICV) Summary <br /> BTEX,MTBE and TPH as Gasoline <br /> EPA Methods 5030/8020/Caltfonua DHS LLT7 Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 248 99 85-115 <br /> Toluene 25 247 99 85-115 <br /> Ethvlbenzene 25 244 98 85-115 <br /> Xylenes Total 75 728 97 85-115 <br /> Gasoline 250 240 96 90-110 <br /> Meth-vi Cert-Butyl Ether 50 47 94 85-115 <br /> ICV25AU060194 <br /> Page 10 <br />