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COLUMBIA ANALYTICAL SERVICES,INC <br />' QA/QC Report <br />' • Client Blaes Environmental Service Request 52401904 <br /> Project U-HAUL#709-50/002-70950-02 Date Collected NA <br /> Sample Matrix Water Date Received NA <br />' Date Extracted NA <br /> Date Analyzed NA <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> Prep Method EPA 5030 Units PERCENT <br /> Analysis Method 8021B CA/LUFT Basis NA <br /> tTest Percent Recovery <br /> Sample Name Lab Code Notes a,a,a-Trifluorotoluene a,a,a-Trifluoro toluene <br /> MW-5-0600 52001904-012 105 102 <br /> 5A-0600 S2001904-013 107 95 <br /> SB-0600 52001904-014 107 102 <br /> MW-6-0600 52001904-015 93 109 <br /> 6A-0600 52001904-016 105 102 <br /> 68-0600 52001904-017 84 87 <br /> MW-8-0600 S2001904-018 105 105 <br /> 8A-0600 52001904-019 106 109 <br /> 9A-0600 52001904-020 106 100 <br /> M9B-0600 52001904-021 90 97 <br /> EB-0600 52001904-022 106 109 <br /> Method Blank 5200710-WB5 GC 03 95 94 <br /> Method Blank 520071 I-WB2 GC 06 108 I04 <br /> BATCH QC 5200710-00IMS 87 97 <br /> Lab Control Sample S200710-LCS2 GC 03 88 108 <br /> Du,Lab Control Sample S200710-DLCS2 GC03 87 105 <br /> CAS Acceptance Limits 70-130 70-130 <br /> E <br /> Approved By '�7�LDate r DO <br /> ISUR2l020397p <br /> Page 38 <br />