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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client Slaes Environmental Service Request 52001904 <br /> Project U-HAUL#6709-50/002-70950-02 Date Collected NA <br /> Sample Matrix, Water Date Received NA <br /> Date Extracted NA <br /> Date Analyzed NA <br /> Surrogate Recovery Summary <br /> Volatile Organic Compounds <br /> Prep Method EPA 5030 Units PERCENT <br /> Analysis Method 8260 Basis NA <br /> Test P e r c e n t R e c o v e r y <br /> Sample Name Lab Code Notes Dibromofluoromethane Toluene-D8 4-Bromofluorobenzene <br /> MW-2-0600 52001904-004 94 95 97 <br /> 2B-0600 52001904-006 95 98 131 <br /> Method Blank(MSO4) S200706-WB 1 98 99 105 <br /> Lab Control Sample S200706-LCS 99 99 105 <br /> Lab Control Sample S200706-DLCS 98 99 104 <br /> Method Blank(MSO4) S200706-WB2 95 97 98 <br /> Method Blank(MS02) 5200707-WB1 103 95 96 <br /> CAS Acceptance Limits 57-167 62-138 62-140 <br /> 1 <br /> Approved By Date <br /> SUR31020597p <br /> Page 76 <br />