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J <br /> SI L Submission: 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): 5030B Test(s): 8260B . <br /> Laboratory Control Spike Water QC Batch#2005/04/25-02.64 <br /> LCS 2005/04/25-02.64-004 Extracted: 04/25/2005 Analyzed: 04/25/200518:04 <br /> LCSD <br /> Compound Conc. ug/L Exp.Conc. 'Recovery% RPDJ Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. I RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 26.1 25.0 104.4 65-165 20 <br /> Benzene 26.9 25.0 107.6 69-129 20 <br /> Toluene 28.8 25.0 115.2 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 533 500 106.6 73-130 <br /> Toluene-d8 1521 500 1104.2 1 1 181-1141 <br /> i <br /> Severn Trent Laboratories, Inc. 05/13/200509:04 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> Page 4 of 6 <br /> A pad dSevern Trent Plc Tel 925 484 1919 Fax 925 484 1096*www.sti-inc.com*CA DHS ELAP#2496 <br />