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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: <br /> ARCO Products Company Service Request: S9602045 <br /> Project: 2186 STOCKTON/21775-237.002/'TO#19350.00 Date Collected: 11/27/96 <br /> Sample Matrix: Water Date Received: 12/3196 <br /> Date Extracted: NA <br /> Date Analyzed: NA <br /> Surrogate Recovery Summary <br /> BTEX,MTBE 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]Mame Lab Code 4-Bromot]uorohenzene a,a,a—'Crifluorotoiuene <br /> MW-1 (74) 59602045-001 <br /> MW-2(74) 59602045-002 105 100 <br /> MW-3 (74) 59602045-003 105 100 <br /> VW-313(60) S9602045-004 105 111 <br /> • Batch QC (MS) 59602044-007MS 101 108 <br /> Batch QC (DMS) 59602044-007DMS 102 99 <br /> Method Blank 5961206-WB1 102 96 <br /> CAS Acceptance Limits: 69-116 69-116 <br /> .1 <br /> SURM60194 <br /> Page 6 <br />