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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> . Chem ARCO Products Gompanv Service Request, 59701961 <br /> ProleLt 20805-114 008fro920791 00/2130 STOCKTON Date Analyzed: 10/1/97 <br /> Initial Calibration Venfication(LCV)Summary <br /> BTEX and Total Volatile Hydrocarbons <br /> Sample Name ICV Units tngho <br /> Lab Code 1CVI Basis NA <br /> Test Notes <br /> ICV Source <br /> Prep Analysis True Percent CAS Acceptance <br /> Analyte Method Method Value Result Recovery Limits <br /> Benzene 5030 8020 25 22 88 80-120 <br /> Toluene 5030 8020 25 23 92 80-120 <br /> Ethvlbenzene 5030 8020 25 23 92 80-120 <br /> Xylenes Total 5030 8020 75 69 92 80-120 <br /> Gasoline 5030 8015M 250 250 100 80-120 <br /> i <br /> . iCV/032196 <br /> Page 14 <br />