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Submission #: 2002-02-0493 <br /> Gas/BTEXI=uel Oxygenates by 8260B <br /> Batch QC Report STL San Francisco <br /> Test Method: 8260FAB Prep Method: 5030B 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Matrix Spike( MS I MSD) Water QC Batch#2002103101-01.27 <br /> Tel 925 484 1919 , <br /> Sample ID: MW-10 >> MS Lab 10: 2002-02-0493-010 Fax 925 484 1096 <br /> .sti-inacam <br /> MS: 2002103101-01.27-027 Extracted:03/01/2002 20:13 Analyzed: 03/01/2002 20:13 ,,r,,,,wwww.w cth incacob.com <br /> Dilution: 1 <br /> ' MSD: 2002103101-01.27-028 Extracted:03/01/2002 20:36 Analyzed: 03/01/2002 20:36 CA OHS ELAP#1094 <br /> Dilution: 1 <br /> Compound Conc.[ug/-] Exp.Conc.[ug/L]Recovery[%] RPD Ctrl.Limits[%] Flags <br /> ' MS MSD Sample MS MSD MS I MSD [%] Recovery RPD MS MSD <br /> Benzene 20.4 21.5 ND 25.0 25.0 81.6 86.0 5.3 69-129 20 <br /> ' Toluene 21.7 23.0 ND 25.0 25.0 86.8 92.0 5.8 70-130 20 <br /> Methyl tert-butyl 22.4 23.9 ND 25.0 25.0 89.6 95.6 6.5 65-165 20 <br /> Surrogate(s) <br /> ' 1,2-Dichloroethan $17 537 500 500 103, 107.3 76-114 <br /> Toluene-d8 1500 515 1500 500 1 100. 1102.9 1 1 88-110 <br /> 1 <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 14 of 15 <br />