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1 4 <br /> STLSubmission:2005-04-0633 <br /> Fuel Oxygenates by 8260B <br /> Treadwell&Rollo-San Francisco <br /> Attn.: David Dixon <br /> 555 Montgomery Street. Suite 1300 <br /> San Francisco, CA 94111-2554 <br /> Phone: (415)955-9040 Fax: (415)955-9041 <br /> Project: 2597.10 Received:04/20/2005 14:00 <br /> Carando <br /> Batch QC Report <br /> Prep(s): 50306 Test(s): 826013 <br /> Laboratory Control Spike Soil QC Batch#2005/04/28-03.62 <br /> LCS 2005/04/28-03.62-039 Extracted: 04/28/2005 Analyzed:04/28/200518:39 <br /> LCSD <br /> Compound Conc. ug/Kg Exp.Conc.1 Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. I RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 53.0 50.0 106:0 65-165 20 <br /> Benzene 63.3 50.0 126.6 69-129 20 <br /> Toluene 64.4 50.0 128.8 70-130 20 <br /> surrogates(s) <br /> 1,2-Dichloroethane-d4 546 500 109.2 72-124 <br /> Toluene-d8 516 . 500 103.2 75-116 <br /> Severn Trent Laboratories, Inc. 05/04/2005 13:06 <br /> STL San Francisco*.1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part or seven Trent Pm Tel 925484 1919 Fax 925 484 1096*www.sti-inc.com*CA DHS ELAP#2496 Page 12 of 15 <br />