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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> iClient EMCON Service Request 59602044 <br /> Project. 2130 Stockton/#21775-229 002/TO#19350 00 Date Analyzed: 1215196 <br /> Initial Calibration Vertfication(ICV) Summary <br /> BTEX, MTBE and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Aeceptanct. <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 252 101 85-115 <br /> Toluene 25 24 8 99 85-115 <br /> Ethvlbenzene 25 26 3 105 85-115 <br /> Xylenes Total 75 74 7 100 85-115 <br /> Gasoline 250 240 96 90-110 <br /> Methyl tort-Butyl Ether 25 22 88 85-115 <br /> [CV25AU060194 <br /> Page 10 <br />