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COLUMBIA ANALYTTCAL SERVICES,INC. <br /> QA/QC Report <br /> SClient ARCO Products Companv Service Request: 59501565 <br /> Project 1775-709 001 /TO# 17075 00/ 2133 Stockton Date Analyzed 12/14/95 <br /> hunal Calibration Venficatson(ICV) Summary <br /> BTEX and TPH as Gasoline <br /> EP,k Methods 5030/8020/Califortua DHS LUFT Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analy#e Value Result Recovery Limits <br /> Benzene 25 246 98 85-115 <br /> Toluene 25 24 5 98 85-115 <br /> Ethvibenzene 25 242 97 85-115 <br /> Xylenes Total 75 744 99 85-115 <br /> Gasoline 250 257 103 90-110 <br /> • <br /> rcvtswuu 1% <br /> Page 6 <br />