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COLUMBIA ANALYTICAL SERVICES,INC. <br /> • QA/QC Report <br /> Client: EMCON Service Request: 59900924 <br /> Project: Tcichert-Stockton/20F90-002.007 Date Collected: NA <br /> Sample Matrix: Water Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed: NA <br /> Surrogate Recovery Summary <br /> Fuel Oxygenates <br /> Prep Method: NONE Units: PERCENT <br /> Analysis Method: 8260 Basis: NA <br /> Test P e 7 C e n t R e e o v e u y <br /> Sample Name Lab Code Notes Dibromofluoromethane Tolueno-DB 4-Bromofluorobenzem <br /> MW-9 59900924-001 96 103 ill <br /> MW-10 S9900924-002 97 I04 109 <br /> MW-11 59900924-003 96 103 109 <br /> MW-12 S9900924-004 97 104 104 <br /> MW-13 59900924-005 95 106 110 <br /> MW-14 S9900924-006 97 106 111 <br /> MW-3 59900924-007 99 103 104 <br /> MW-4 S9900924-008 99 104 106 <br /> S 59900924-009 99 103 104 <br /> ethodBlank(MSD1) 5990324-WBI 97 104 104 <br /> Method Blank(MSD1) 5990324-WB2 97 104 104 <br /> Method Blank(MSD 1) 5990325-WB1 96 104 104 <br /> EPA Acceptance Limits: 86-118 88-110 86-115 <br /> SURMM20597p <br />