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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client ARCOl'roduc,tS Cnmpanv Service Request. S9700958 <br /> Project 21775-22 9(103/ro#21333 00/2130 S COCKTON Date Collected- NA <br /> Sample Matj n \\""ler <br /> Date Reserved: NA <br /> Date Extracted: NA <br /> Date Analyzed. NA <br /> Surrogate Recovery Summary <br /> BTEX MTBE and TPH as Gasoline <br /> Prep Method 1 PA 5030 <br /> Analysts Method �,020 CA/LU-FT Units PERCENT <br /> Basis NA <br /> Test Percent Recovery <br /> Sample Name Lab Code Notes 4-Bromotluorobenzene a,a,a-Trtfluorotoluene <br /> MW-1 (73) 59700958-001 94 93 <br /> MW-2 (72) 59700958-002 93 104 <br /> MW-3(73) 59700958-003 96 88 <br /> MW-4(73) 59700958-004 101 S4 <br /> MW-5 (75) 59700958-005 92 96 <br /> MW-6(72) S9700959-006 92 <br /> 94 <br /> MW-7(71) 59700958-007 194 84 <br /> MW-10(70) 59700958-008 85 <br /> VW-1 (62) S9700958-009 103 <br /> VW-7(52) 59700958-010 91 10798 86 <br /> VW-8 59700958-011 95 103 <br /> VW-12(61) 59700958-012 93 114 <br /> BATCH QC S9700959-002MS 96 106 <br /> BATCH QC 59700959-002DMS 99 105 <br /> Method BL A 597053()-WR2 91 87 <br /> Method Blank 5970602-W131 101 96 <br /> Method Blank 5970603-WBI 98 89 <br /> CAS Acceptance Limrts 69-116 69-116 <br /> 1,UR2/020197p <br /> Page 19 of 21 <br />