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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: ARCO Products Companv Service Request. S9501597 <br /> Project- 1775-229 001 /TO# 17075 00/2130 Stockton Date Analyzed- 12/18/95 <br /> Initial Calibration Verification(ICV) Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/80201Cahforma DHS LUFT Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 22 7 91 85-115 <br /> Toluene 25 225 90 85-115 <br /> Ethvlbenzene 25 223 89 85-115 <br /> Xvlenes Total 75 673 90 85-115 <br /> Gasoline 250 247 99 90-110 <br /> 1CV25AU060194 <br /> Page 6 <br />