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4 <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: EMCON Service Request: S951019 <br /> Protect: 1775-220 001 /TO# 17075 00/2076 Lodi Date Analyzed: 8/24/95 <br /> Initial Calibration Verification(ICV) Summary <br /> BTEX 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 Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 256 102 85-115 <br /> Toluene 25 243 97 85-115 <br /> Ethylbenzene 25 243 97 85-115 <br /> Xylenes, Total 75 706 94 85-115 <br /> Gasoline 250 242 97 90-110 <br /> • <br /> ICV25A1J060194 <br /> Page 6 <br />