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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 I MSD) Water QC Batch#2005103101-1B.68 <br /> MS/MSD Lab ID: 2005=02--0812 003 <br /> MS: 2005/03101-1 B.68-013 Extracted:03/0112005 Analyzed: 03/0112005.11:13 <br /> Dilution: 1.00 <br /> MSD: 2005103101-16.68-030 Extracted:03/01/2005 Analyzed: 03101/200511:30 <br /> Dilution: ..1.00 <br /> Compound Conc. ug/L Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample ug1L MS MSD RPD Rec. RPD MS MSD <br /> Methyl Cert-butyl ether 24,9 23.6 ND 25 99.6 94.4 5.4 65-165 20 <br /> Benzene 26.7 24.5 ND 25 106.8 98.0 8.6 69-129 20 <br /> Toluene 27.3 25.7 ND 25 109.2 102.8 6.0 70-130 20 <br /> Surrogate(s) <br /> 1,2-gichloroethane-d4 468 474 500 93.5 94.8 73-130 <br /> Toluene-d8 558 559 500 111.6 111.8 1 81-114 <br /> { <br /> f <br /> f <br /> i <br /> Severn Trent Laboratories, Inc. 03/021200517:58 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton,CA 94566 <br /> A partofSe mTmnl Plc Tel 925 4B4 1919 Fax 925 484 1096 www.sti-inc.com`CA DHS FLAP#2495 Page 35 of 36 <br /> f: <br />