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COLUMBIA ANALYTICAL SERVICES, INC. <br /> . QA/QC Report <br /> Client: EMCON Service Request: 59900997 <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 /> BTEX and TPH as Gasoline <br /> Prep Method: EPA 5030 Units: PERCENT <br /> Analysis Method: 8020 CA/LUFT Basis: NA <br /> Test Percent Recovery <br /> Sample Name Lab Code Notes 4-Bromofluorobenzene a,a,a-Tritluorotoluene <br /> TK-8E 59900997-001 103 104 <br /> TK-8C 59900997-002 106 94 <br /> TK-8W 59900997-003 103 93 <br /> D S-1(3.5) S9900997-004 101 104 <br /> DS-2(3.5) 59900997-005 100 104 <br /> PL-1(3.5) S9900997-006 96 98 <br /> Method Blank 5990331-SB1 107 103 <br /> Method Blank 5990402-SBI 102 102 <br /> CAS Acceptance Limits: 51-137 51-137 <br /> 5 UR2i020397p <br />