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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: ARCO Products Companv Service Request: 5951093 <br /> Protect 1775-206 001/TO# 17075 00/548 Stockton Date Analyzed- 9/7/95 <br /> Initial Calibration Verification(ICV) Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Caltforrua DHS LUFT Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> i <br /> Benzene 25 23 3 93 85-115 <br /> Toluene 25 23 2 93 85-115 <br /> Ethvlbenzene 25 227 91 85-115 <br /> Xvlenes Total 75 692 92 85-115 <br /> Gasoline 250 247 99 90-110 <br /> • <br /> ICV25A1106o194 <br /> Page 6 <br />