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•1 <br /> COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client: ARCO Service Request: 59600288 <br /> Project: 2186 Stockton / #21775-237.002 /TO#19350.00 Date Collected: 2/16/96 <br /> Sample Matrix: Water Date Received: 2120196 <br /> Date Extracted: NA <br /> Date Analyzed: 2/26196 <br /> Surrogate Rccovuv Summar% <br /> BTEX and TPH as Gasoline <br /> EPA Methods 51130/8020/California DHS LUFC Method <br /> PID Detector FID Detector <br /> Percent Recovery Percent Recovery <br /> Sample Name Lab Code 4-13romotluorobcnzcne (x,cx,a—Trifluorotoluenc <br /> MW-1 (74) 59600288-001 82 88 * <br /> MW-2 (74) 59600288-002 97 99 <br /> MW-3 (73) 59600288-003 100 98 <br /> Method Blank S9600288MB 95 94 <br /> CAS Acceptance Limits: 69-116 69-116 <br /> * The surrogate used for this sample was 4-Bromotluorobcnzcne. <br /> 'URV060194 Page 5 <br />