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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client EMCON Service Request- S9600244 <br /> Protect. 2130 STOCKTON 21775-229 002/TO#19350 00 Date Analyzed. 2/12/96 <br /> Initial Calibration Verification(ICV) Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS I.UFT Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 242 97 85-115 <br /> Toluene 25 244 98 85-115 <br /> Ethylbenzene 25 244 98 85-115 <br /> Xylenes, Total 75 748 100 85-115 <br /> Gasoline 250 239 96 90-110 <br /> ICV25AU060194 <br /> Page 7 <br />