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Submission#: 2004-04-0264 <br /> Gas/BTEX Fuel Oxygenates by 8260B , <br /> • <br /> URS Corporation STL San Francisco <br /> Attn.: Vernon220 Quarry Laneon Elarth Pleasanton,CA 94586 <br /> 2870 Gateway Oaks Drive, Suite 300 <br /> Sacramento, CA 95833 Tel:(925)484-1919 <br /> Phone: (916)679-2000 Fax: (916)679-2900 Fax:(925)484-1096 <br /> www,stl-inc.com <br /> Project: Consultant Project No: 38466402.000000 Received: 04/09/2004 09:35 www,chromalab.com <br /> BP Facility No: 548 <br /> Site: 1612 W. Hammer Lane, Stock PHS ELAN 2496 <br /> Batch:.QCtRe rt <br /> Pr"ep(s) 50305 _ Test(s):82605 <br /> x <br /> Laboratory Controt$pike t Water QC'Batch'#2004104110'I B89` <br /> LCs . 2004104110-'iB 69;b(0 Extraited 0411012{)04 Analyzed 04/10/2604,09:110 ': <br /> LCSD 2004/04/ 0=16 69=029 Ddddted .04/1012004 µ 'Analyzed. 04/110/2604 <br /> Compound Conc, ug/L Exp.Conc. Recovery% RPD Ctrl,Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 29.4 27.8 25 117.6 111.2 5.6 65-165 20 <br /> Benzene 27.0 24.7 25 108.0 98.8 8.9 69-129 20 <br /> Toluene 25.5 25.6 25 106.0 102.4 3.5 70-130 20 <br /> Surroga tes(s) <br /> 1,2-Dichloroethane-d4 466 457 500 93.2 91.4 76-114 <br /> • Toluene-d8 486 495 500 97.2 99.0 88-110 <br /> 04/14/2004 16:56 STL San Francisco is Dart of Severn Trent Laboratories.Inc. Page 5 of 5 <br />