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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> iClient. ARCO Products Companv Service Request: 59501597 <br /> Project. 1775-229 001 /TO# 17075 00/ 2130 Stockton Date Collected: 12/7/95 <br /> Sample Matrix. Water Date Received: 12/12/95 <br /> Date Extracted: NA <br /> Date Analyzed: 12118,19195 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> PID Detector FID Detector <br /> Percent Recovery Percent Recovery <br /> Sample Name Lab Code 4-Bromofluorobenzene ot,oc,a—Trifluorotoluene <br /> MW-1 (73) 59501597-001 83 111 <br /> MW-2 (72) 59501597-002 92 106 <br /> MW-3 (73) 59501597-003 91 102 <br /> MW4(74) S9501597-004 90 96 <br /> MW-5 (76) 59501597-005 86 99 <br /> MW-6(72) 59501597-006 83 95 <br /> MW-7 (72) S9501597-007 97 95 <br /> MW-8(73) S9501597-008 92 98 <br /> MW-10 (71) S9501597-009 86 112 <br /> MW-2 (72) MS S9501597-002MS 87 113 <br /> MW-2 (72) DMS 59501597-002DMS 89 110 <br /> Method Blank S951218-WB 95 102 <br /> CAS Acceptance Limits 69-116 69-116 <br /> suRvosoi9a <br /> Page 5 <br />