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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: EMCON Service Request: 59901065 <br /> Project: USA Station No.65/Lodi,CA/20A41-008.001 Date Collected: NA <br /> Sample Matrix: Water Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed: NA <br /> Surrogate Recovery Summary <br /> BTEX, MTBE 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 /> MW-1 59901065-001 82 103 <br /> MW-2 59901065-002 91 94 <br /> MW-3 S9901065-003 80 100 <br /> MW-4 S9901065-004 86 105 <br /> MW-5 S9901065-005 77 98 <br /> MW-6 S9901065-006 85 108 <br /> MW-7 59901065-007 93 102 <br /> MW-8 59901065-008 86 114 <br /> S-1 S9901065-009 84 115 <br /> *S-2 59901065-010 75 99 <br /> Method Blank 5990406-WBI (GC2) 92 107 <br /> Method Blank 5990407-WB 1 (GC2) 89 100 <br /> Method Blank 5990408-WB I (GC2) 100 104 <br /> Method Blank 5990410-WB 1 (GC2) 98 98 <br /> Method Blank 5990412-WB1 (GC2) 93 107 <br /> CAS Acceptance Limits: 69-116 69-116 <br /> • <br /> SUkm20397p <br /> Pap,e 25 <br />