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STLSubmiss:on # 2003-07-0859 <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 /> Protect 180238 80 Received 07/29/2003 10 15 <br /> Conoco #4409 <br /> Site 1502 N EI Dorado St , Stockton, CA <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike <br /> Water QC Batch#2003/08/09-1B 64 <br /> LCS 2003108109-1 B 64-018 Extracted 08/09/2003 An I ed 08/09/2003 11 18 <br /> LCSD 2003108109-1 B 64-040 Extracted 08/09/2003 Anal ed 08/09/2003 1140 <br /> Compound Conc ug/L Exp Conc Recovery% JRPD Ctrl Limits% Flags <br /> LCS LCSD LCS ILCSD % Rec RPD LCS I LCSD <br /> Benzene 270 264 25 1080 1056 22 69-129 20 <br /> Toluene 259 258 25 103 6 1032 04 70-130 20 1 <br /> Methyl tert-butyl ether(MTBE) 249 25 5 25 99 6 1020 24 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 521 548 500 1042 1096 76-114 <br /> Toluene-d8 486 493 500 972 986 88-110 <br /> Severn Trent Laboratories, Inc 08/12/2003 10 55 <br /> STL San Francisco' 1220 Quarry Lane, Pleasanton CA 94566 <br /> A part of Sevem Trent Pk Tel 925 484 1919 Fax 925 484 1096*www stl-inc corn'CA OHS ELAP#2496 Page 19 of 22 <br />