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Submission: 2005-02-0540 <br /> STL <br /> Gas/BTEX Fuel Oxygenates by 8260B <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): 50308 Test(s):8260E <br /> Matrix Spike (MS 1 MSD) Water QC Batch#200510212E-2A:62 <br /> MW-11 >> MS Lab IIS: 2005.02-0540 001 <br /> MS: 2005102125-2A.62-045 Extracted:02/25/2005 Analyzed: 02/25/2005 09:45 <br /> Dilution: 1.00 <br /> MSD: 2005102125-2A.62-012 Extracted:02/25/2005 Analyzed: 021251200510:12 <br /> Dilution: 1.00 y <br /> Compound Conc. ug 1L S k.Leve Recovery% Limits% Flags <br /> Ms MSD Sample u /L MS MSD RPD Rec. RPD MS MSD <br /> Methyl tert-butyl ether 25.9 22.9 ND 25 103.6 91.6 12.3 65-165 20 <br /> Benzene 23.7 25.4 ND 25 94.8 101.6 6.9 69-129 20 <br /> Toluene 23.2 23.0 ND 25 92.8 92.0 0.9 70-130 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 512 520 500 102.4 104.0 73-130 <br /> Toluene-d8 544 506 500 108.8 101.2 81-114 <br /> I <br /> Severn Trent Laboratories, Inc. 031021200517:58 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apart of5evem Tmnl Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com`CA DHS FLAP#2496 Page 31 of 36 <br />