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l <br /> Submission #: 2002-04-0276 0 0 <br /> i Gas/BTEXFuel Oxygenates by 82608 MY 141 <br /> Batch QC report <br /> STL San Francisco <br /> Test Method: 8260FAS Prep Method: 5030B 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2002/04/17-01.27 <br /> Tel 925 484 1919 <br /> Analyzed: Fax 925 484 1096 <br /> LCS: 2002/04/17-01.27-007 Extracted: 04/17/200212:13 y 04/17/200212:13 www.stl-inc.com <br /> LCSD: 2002/04/17-01.27-008 Extracted: 04/17/200212:41 Analyzed: 04/17/200212:41 www.chromalab.com <br /> CA DHS ELAP#1094 <br /> Compound Conc.[ug/L] Exp.Conc.[ug/L] Recovery RPD Ctri.Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Benzene 22.6 21.4 25.0 25.0 90.4 85.6 5.5 69-129 20 <br /> Toluene 23.2 22.3 25.0 25.0 92.8 89.2 4.0 70-130 20 <br /> Methyl tert-butyl ether 21.9 20.8 25.0 25.0 87.6 83.2 5.2 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 483 488 500 500 96.6 97.6 76-114 <br /> Toluene-d8 483 478 500 500 96.6 95.6 88-110 <br />{ <br /> i <br /> i <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 5 Of b <br /> i <br />