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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Service Request: S9900997 <br /> Project: Teichert&Sons,Stockton/20F90-002.007 Date Collected: NA <br /> Sample Matrix: Soil 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 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 /> TK-8E S9900997-001 95 104 107 <br /> TK-8C S9900997-002 96 105 108 <br /> TK-8W 59900997-003 95 105 109 <br /> DS-1(3.5) S9900997-004 92 104 118 <br /> DS-2(3.5) S9900997-005 93 104 111 <br /> PL-1(3.5) 59900997-006 94 104 110 <br /> Method Blank S990331-SBI 95 105 109 <br /> i <br /> EPA Acceptance Limits: 80-120 81-117 74-121 <br /> �omsa�p <br />