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. COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> tent: ARCO Products Company Service Request. 59600993 <br /> lect: 2130 Stockton/#20805-114 006/T0#18957 00 Date Collected: 6/18196 <br /> LCS Matrix Vapor Date Received. 6119196 <br /> Date Extracted: NA <br /> Date Analyzed- 6/20/96 <br /> Laboratory Control Sample Summary <br /> BTEX and Total Volatile Hydrocarbons <br /> EPA Methods 5030/8020/Modified 8015 <br /> Units uL/L(ppmv) <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 7 5 8 1 108 80-120 <br /> Toluene 6 4 67 105 80-120 <br /> Ethyibenzene 5 5 5 6 102 80-120 <br /> LCS1121594 <br /> Page 10 <br />