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COLUMBIA ANALYTICAL SERVICES,INC <br />' QA/QC Report <br /> Client Blaes Environmental Service Request 52001904 <br /> Project U-HAUL#709-50/002-70950-02 Date Collected NA <br /> LCS Matrix Water Date Received NA <br /> Date Extracted NA <br /> Date Analyzed 717100 <br /> Laboratory Control Sarnple/Duplicate Laboratory Control Sample Summary <br /> Fuel Oxygenates <br /> Sample Name Lab Control Sample Units ug/L(ppb) <br /> I Lab Code S200707-LCS S200707-DLCS 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 /> 1,1-Dichloroethene EPA 5030A 8260 100 100 750 709 75 71 62-145 6 <br /> Benzene EPA 5030A 8260 100 100 859 7 83 86 78 77-127 9 <br /> Trichloroethene EPA 5030A 8260 100 100 894 841 89 84 71-119 6 <br /> Toluene EPA 5030A 8260 100 100 943 853 94 85 76-124 10 <br /> Chlorobenzene EPA 5030A 8260 100 100 9 27 8 35 93 84 75-127 10 <br /> I <br /> I <br /> Approved By JDate Z /-S/Oo <br /> DLCS/020597p <br /> Page 67 <br />