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U Y <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client ARCO Products Companv Servu.e Request 59600328 <br /> ProleLt 21775-234 002/##TO19350 00142168 STOCKTON Date Analvzed 318196 <br /> Initial Calibration Verification (ICV) Summary <br /> BTEX MTBE and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> 'Prue PerLLnt Acceptance <br /> Analvte Value Result Recovery Limits <br /> Benzene 25 23 7 95 85-115 <br /> Toluene 25 23 7 95 85-115 <br /> Ethylbenzene 25 23 4 94 85-115 <br /> Xylenes Total 75 71 3 95 85-115 <br /> MTB8 50 48 96 90-110 <br /> TPHG 250 248 99 85-115 <br /> i <br /> Ic.V25AG05019A <br /> Page i l <br />