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TLSubmission #: 2403-02-0312 <br /> Gas/BTEX Fuel Oxygenates by 8260B -�• <br /> Gettler Ryan <br /> Attn.: Deanna Harding <br /> 6747 Sierra Court Suite J <br /> Dublin, CA 94568 <br /> Phone: (925) 551-7444 Fax: (925) 551-7899 <br /> Project: 180175.80 Received: 02/18/2003 08:35 <br /> Tosco#11195 <br /> Site: 16500 South interstate 5, <br /> Lathrop, CA <br /> Batch QC Report <br /> Preps) 5030B' B2 <br /> - <br /> Laboratory Control Spike Water = QC Batch# 200.3102124 0'1 27: <br /> LCS 2003!02124'a1 27-Q04 Extracted; 0 212 412 0 0 3 Analyzed 02/24/2003 12 22 <br /> LCSD 2003102x24=01 27__005. :.,, :. . Extracted;02/2412003 Analyzed-02/24, .....2003 12 44, <br /> Compound Conc. ug/L Exp.Conc. Recovery JRPD Ctrl.Limits % Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 23.4 23.0 25.0 93.6 92.0 1.7 69-129 20 <br /> Toluene 23.2 23.3 25.0 92.8 93.2 0.4 70-130 20 <br /> Methyl tent-butyl ether(MTBE) 25.2 125.3 25.0 10x.8 101.2 0.4 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 512 503 500 102.4 100.6 76-114 <br /> Toluene-d8 466 463 500 93:2 92.6 88-110 <br /> Severn Trent Laboratories, Inc. 03/06/2003 15:50 <br /> STL San Francisco' 1220 Quarry Lane, Pleasanton,CA 94566 <br /> A part.1 S.—7-1 Plc Tel 925 464 1919 Fax 925 484 1-096"www.sil-inc.com'CA DHS ELAP#2496' Page 27 of 30 <br />