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------------------ <br /> Submission #: 2002-05-0424 <br /> ZM <br /> Fuel Oxygenates by 82608 , <br /> Batch QC report <br /> STL San Francisco <br /> Test Method: 8260B Prep Method: 5030B 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Laboratory Control Spike (LCSILCSD) Water QC Batch# 2002105130-01.27 Tel 925484 1919 <br /> LCS: 2002/05130-01.27-003 Extracted: 05/30/2002 11:24 Analyzed: 05/30/2002 11:24 Fax 925 484 1096 <br /> www.sti-inc.com <br /> LCSD: 2002/05/30-01.27-004 Extracted: 05130/200211:43 Analyzed: 05/301200211:43 www.chromatab.com <br /> CA DHS ELAP#2496 <br /> Compound Conc.[ug/L] Exp.Conc.[ug/L] Recovery RPD Ctrl.Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Benzene 22.8 22.6 25.0 25.0 91.2 90.4 0.9 69-129 20 <br /> Toluene 24.7 25.1 25.0 25.0 98.8 100.4 1.6 70-130 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 486 518 500 500 97.2 103.6 76-114 <br /> Toluene-d8 491 515 500 500 98.2 103.0 a8-110 <br /> STL San Francisco is a part of Severn Trent Laboratories, Inc. Page 4 of 4 <br />