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,p {r ► <br /> COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Whent ARCO Products Companv Service Request, S9601431 <br /> Project 548 Stockton/ =21775-206 002/TO#19350 00 Date Collected: 8129196 <br /> Sample Matrix Water Date Received 8/30/96 <br /> Date Extracted: NA <br /> Date Analvzed 919-11196 <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 /> Perctnt Recovery Percent Recover <br /> Sample Name Lab Code 4-Bromot7uorobenzene oe,cx,cx—Trifluorototuen: <br /> MW-1 (56) 59601431-001 101 97 <br /> MW-2 (6 1) S960143 1-002 101 94 <br /> MW-3 (62) S9601431-003 102 98 <br /> MW-4 (56) 59601431-004 l01 98 <br /> MW-5 (56) S9601431-005 100 t03 <br /> MW-6 (59) S9601431-006 101 98 <br /> VW-1 (43) S9601431-007 100 102 <br /> VW-2 (4 1) S9601431-008 102 97 <br /> VW-3 (4 1) S960143I-009 91 100 X <br /> VW-4(42) S960t431-010 l01 99 <br /> Batch QC (MS) 59601425-OOIMS 98 107 <br /> Batch QC (DMS) 59601425-00 I DMS 98 106 <br /> Method Blank S960909-WB l 101 98 <br /> Method Blank S960910-WBI 102 93 <br /> Method Blank 5960911-WBI 100 94 <br /> CAS Acceptance Limits 69-116 69-116 <br /> X The surrogatc used for this sample was 4-Bromofluorobenzene <br /> Page 9 <br />