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7 <br /> Submission #: 2002-03-0469 <br /> Fuel Oxygenates by 8260E (Low Level) <br /> >i f <br /> Batch QC report <br /> STL.San Francisco <br /> Test Method: 8260B Prep Method: 50308 1220 quarry Lane <br /> 7.1 Pleasanton,CA 94566 <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2002103125-01.27 Tel 925 4841919 <br /> LCS: 2002103125-01.27-009 Extracted: 03/25/2002 17:02 Analyzed: 03/25/2002 17:02 Fax 925 4841096 <br /> www.stl-inc,cornom <br /> LCSD: 2002103125-01.27-010 Extracted: 03/25/2002 97:26 Analyzed: 03/25/2002 17:26 www.chromalab.com <br /> CA DHS ELAP#1094 <br /> Compound Conc.[ug/Ll Exp.Conc.[ug1L] Recovery RPD Ctrl.Limits[%] Flags <br /> Ij <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Methyl Cert-butyl ether 21.6 23.7 25.0 25.0 86.4 94.8 9.3 65-165 20 <br /> `s Benzene 21.8 22.5 25.0 25.0 87.2 90,0 3.2 69-129 20 <br /> Toluene 22.9 23.9 25.0 25.0 91.6 92.4 0.9 70-130 20 <br /> .�, Surrogate(s) <br /> 1,2-Dichloroethane-d4 506 534 500 500 101.2 106.8 76-114 <br /> :0 <br /> E - <br /> i . <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 4 of 4 <br /> l <br />