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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client EMCON Scmee Request 5950638 <br /> Protect ARCO Facility No 760/EMCON Project No 1775-212 001 Date Analyzed 5123195 <br /> Initial Calibration Verification(ICV) Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Califorma DHS LLTFT Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 27 1 108 85-115 <br /> Toluene 25 266 106 85-115 <br /> Ethylbcnzene 25 275 110 85-115 <br /> Xylenes Total 75 822 110 85-115 <br /> Gasoline 250 247 99 90-110 <br /> Approved By Date 64d) <br /> IC V25AU060194 <br /> 0638 XLs wgbtXC&L MOM Page No <br /> 1921 Ringwood Avenue Son Jose California 95131 Telephone 4081437-2400 • Fax 4081437-9356 <br />