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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: ARCO Products Company Service Request: S9700685 <br /> Project: 20805-146 010/TO#20682 00/2168 STOCKTON Date Analyzed: 4/17/97 <br /> Initial Calibrauon Verification(ICV) Summary <br /> BTEX and Total Volatile Hydrocarbons <br /> Units Mg/m3 <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 25 100 80-120 <br /> Toluene 25 25 100 80-120 <br /> Ethylbenzene 25 25 t00 80-120 <br /> Xylenes,Total 75 74 99 50-120 <br /> Gasoline 250 250 I00 80-120 <br /> Methyl tert-Butyl Ether 25 26 104 80-120 <br /> 1cv25nuu0194 <br /> Page I I <br />