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rrrs� <br /> COLUMBIA AN LYTICAL SERVICES,INC <br /> QA/QC Report ------- <br /> Client: EMCON Associates Service Request: 5950269 <br /> Project ARCO Factltty No 2130/EMCON Project No 1775-229 01 Date Analyzed 3110195 <br /> buttal Calibration Verification(ICV) Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFr Method <br /> Uruts ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 252 101 85-115 <br /> Toluene 25 24 2 97 85-115 <br /> Ethvlbcnzenc 25 24 G 98 85-115 <br /> Xylenes Total 75 710 95 85-115 <br /> Gasoline 250 274 110 90-110 <br /> Approved By Date <br /> IC V25AU060194 <br /> Page 6 <br />