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+ <br /> STL <br /> Submission#: 2403-04-0389 <br /> Fuel Oxygenates by 8260B <br /> San Joaquin Company, Inc. <br /> Attn.: Dai Watkins <br /> 1120 Hollywood Ave, Suite 3 <br /> Oakland, CA 94602-1459 <br /> Phone: (510) 336-1772 Fax: (510) 336-9119 <br /> Project: 9902.013 Received: 04/15/2003 17:19 <br /> C. Navarra <br /> Hatch QC Report <br /> Prep(s):_5030B Test(s):82608 <br /> Laboratory Control Spike Water QC.batch#2003/04/24-16.62 <br /> LCS 2003/04124-16.62-040 Extracted: 0.4/24/2003 Analyzed: 0412412003 11:40 <br /> LCSD. 2003104124-1 B.62=051 Extracted: 04/24/2003 Analyzed: 0412412003.10:51 <br /> Compound Conc. ug/L Exp.Conc. Recovery RPD Ctr Limits% Flags <br /> LCS LCSD LCS LCSD % Rec.. RPD LCS LCSD <br /> Benzene 25.4 20.8 25.0 101.6 83.2 19.9 69-129 20 <br /> Toluene 25.7 21.3 25.0 102.8 85.2 18.7 70-130 20 <br /> {-- Methyl tent-butyl ether(MTBE) 30.4 27.5 25.0 121.6 110.0 110.0 65.165 20 <br /> Surrogates(s) <br /> } 1,2-Dichloroethane-d4 504 544 500 100.8 108.8 76-114 <br /> E � TalueneA8 499 512 500 99,8 102.4 88-110 <br /> i:' <br /> r_} I <br /> 'r <br /> k <br /> i Severn Trent Laboratories, Inc. 0510612003 16:18 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pad W Severn T."I M. Tel 925 484 1919 Fax 925 484 1096*www.sti-Inc.com'CA DHS ELAP#2496 Page 24 of 28 <br />