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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client 131ae, Enviroiunental Service Request S2000486 <br /> Project U-H,ad #70950 SCl/002-70950 Date Collected NA <br /> Sample Mati xr Waiter Date Received NA <br /> Date Extracted NA <br /> Date Analyzed NA <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> Prep Method LPA 5030 Units PERCENT <br /> Analysis Method 8021B CA/LUFT Basis NA <br /> ITest Percent Recovex y <br /> Sample Name Lab Code Notes a,a,a-Trifluorotoluene a,a,a-Tnfluorotoluene <br /> EB-0200 52000486-011 98 104 <br /> .BATCH QC S2000481-003MS 96 109 <br /> BATCH QC S2000481-003DMS 98 106 <br /> ILab Coptrol Sample S200210-LCS 96 110 <br /> Method Blank 5200210-WB1 100 104 <br /> CAS -Acceptance Liimts 7 _ <br /> p Ola 0°/0 701301% <br /> I <br /> Approved By Date :2-':2 <br /> SUR21020397p <br /> IPage 20 <br />