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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client ARCO ProdLILLS Compam Servile Request. S9700500 <br /> Project 31 30 STOChTON/20805-114 009/T0#20791 00 Date Collected• NA <br /> LCS Matt ix -fir Date Received NA <br /> Date Extracted. NA <br /> Date Analyzed. 3121197 <br /> Laboratory Control Sample Summary <br /> BTEX and Total Volatile Hvdrocarbons <br /> Units rog/m' <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analvte Value Result RCLM'ery Limits <br /> Gasoline 200 218 109 60-140 <br /> 1 C SV321504 <br /> Page 9 <br />