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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> TientERCO Real Estate Company Service Request L2003110 <br /> Protect U-Haul/#709-501002-70950-02 Date Collected NA <br /> LCS Matrix Water Date Received NA <br /> Date Extracted NA <br /> Date Analyzed 1015100 <br /> Laboratory Control Sample/Duplicate Laboratory Control Sample Summary <br /> Volatile Organic Compounds <br /> I Sample Name Duplicate Lab Control Sample Units ug/L(ppb) <br /> Lab Code L201005-LCS 1, L201005-DLCSI Basis NA <br /> Test Notes <br /> Percent Recovery <br /> CAS Relative <br /> Prep Analysis True Value Result Acceptance Percent Result <br /> Analyte Method Method LCS DLCS LCS DLCS LCS DLCS Limits Difference Notes <br /> Benzene EPA 5030 8260B 250 25 0 261 25 2 104 101 76-127 4 <br /> Toluene EPA 5030 8260B 250 25 0 260 252 104 101 76-125 3 <br /> Ethylbenzene EPA 5030 8260B 250 250 25 2 25 2 101 101 75-130 <1 <br /> Xylenes,Total EPA 5030 8260B 75 0 750 715 724 95 97 75-130 1 <br /> Methyl tert-Butyl Ether EPA 5030 8260B 500 500 51 1 507 102 101 50-150 <1 <br /> lie <br /> r <br /> Approved By Date lc2oir� <br /> 031 10V0 AU 1 11 <br /> 1111111100 8260WOXY XLT <br />