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Submission: 2005-02-0540 <br /> STL <br /> Gas1BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geoscience- Irvine <br /> Attn.:Anju Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone: (949) 341-7440 Fax: (949) 753-0111 <br /> Project: 41050001 FA20 Received: 02/16/2005 12:18 <br /> Conoco Phillips# 11195 <br /> Site: 16500 S. Interstate 5 Lathrop <br /> Batch QC Report <br /> Prep(s): 5030B Test(s):8260E . <br /> Matrix Spike ( MS!MSD ) Water QC Batch#2005102128-1A.64 <br /> MS/MSD Lab ID- <br /> 2005-02-0625-018 <br /> MS: 2005102128-1A.64-021 Extracted: 02/28/2005 Analyzed: 021281200511:21 <br /> i <br /> Dilution: 1.00 <br /> MSD: 200510212$-1A.64-043 Extracted:02/28/2005 Analyzed:... 02/2812005.11:43. <br /> Dilution: 1.00 <br /> Compound Conc. u /L Spk.Level Recovery% Limits% Fa s ?. <br /> - - <br /> MS MSD Sample ug/L MS MSD RPD Rec. RPD MS MSD <br /> Methyl tent-butyl ether 24.6 24.0 ND 25 98.4 96.0 2.5 65-165 20 <br /> Benzene 24.6 24.2 ND 25 98.4 96.8 1.6 69-129 20 E <br /> Toluene 25.7 25.7 ND 25 102.8 102.8 0.0 70-130 20 <br /> Surrogate($) <br /> 1,2-Dichloroothane-d4 499 489 500 99.8 97.8 73-130 <br /> Toluene-d8 520 535 500 104.0 107.0 81-114 <br /> I <br /> 1 <br /> {f <br /> V <br /> r <br /> f <br /> i <br /> 4 <br /> f <br /> F <br /> I[F <br /> I <br /> - l <br /> Severn Trent Laboratories, Inc. <br /> 43/02/2005 17:58 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 r <br /> Apad&Se Trent Pk Tel 925 484 1919 Fax 925 484 1096*www.stl-inc.com`CA QHS FLAP#2496 Page 33 of 36 k <br />