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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client ARCO Products Company Service Request- 59600831 <br /> Project 760 LODI/#21775-212 002/T'O#19350 00 Date Analyzed 5131196 <br /> Initial Calibration Verification(ICV) Summan <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFI'Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> 4nalytc Value Result Recovery Limits <br /> Benzene 25 249 100 85-115 <br /> Toluene 25 25 1 100 85-115 <br /> Ethvlbenzcne 25 253 101 85-115 <br /> Yvlenes Total 75 76 4 IO2 85-115 <br /> Methyl tcrt-ButN I Ether 50 49 98 85-115 <br /> Gasoline 250 245 98 90-110 <br /> C VI5AU060194 <br /> Page 10 <br />