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Submission #: 2002-03-0551 <br /> Fuel Oxygenates by 8260B (Low Level) <br /> Batch QC report <br /> 57L San Francisco <br /> lest Method: 8260B Prep Method: 5030B 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch#2002103/28-01.27 Tel 925 484 1919 <br /> Analyzed: Fax 925 4841096 <br /> LCS: 2002103128-01.27-003 Extracted: 031281200211:19 03/28/2002 11:19 www.sti-inc.corn <br /> LCSD: 2002103128-01.27-004 Extracted: 031281200211:47 Analyzed; 03/28/2002 11:47 www.chromalab.com <br /> CA DHS EMAP#1094 <br /> Compound Conc.[ug/Ll Exp.Conc.[ug/L] Recovery RPO Ctrl.Llmits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> i Methyl tert-butyl ether 18.8 21.6 25.0 25.0 75.2 86.4 13.9 65-165 20 <br /> Surrogafe(s) <br /> 1,2-DIchloroethane-d4 541 533 500 500 108.2 106.6 76-114 <br /> f< <br /> i <br /> •4 <br /> l <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 4 of 5 <br />