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STLSubmission # 2003-02-0471 <br /> GasIBTEX Fuel Oxygenates by 82606 <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 180137 80 Received 02/24/2003 14 15 <br /> Tosco#5886 <br /> Site 2701 W March Lane <br /> Stockton, CA <br /> - Batch QC Report <br /> s <br /> Prep(s) 50308 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch# 2003103104-01 27 <br /> LCS 2003103104-01 27-003 Extracted 03104/2003 Analyzed 03/04/2003 10 45 <br /> LCSD 2003103104-01-27-004 Extracted 03/04/2003 Analyzed 03/04/2003 11 12 <br /> Compound Conc ug/L Exp Conc Recovery RPD Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 21 7 207 25 0 868 828 4 7 69-129 20 <br /> Toluene 22 2 21 8 250 888 87 2 1 8 70-130 20 <br /> Methyl teri-butyl ether(MTBE) 256 .264 250 11024 1056 3 1 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 531 536 500 1062 1072 76-114 <br /> Toluene-d8 506 485 500 1012 970 88-110 <br /> Severn Trent Laboratories, Inc 031071200315 06 <br /> STL San Francisco' 1220 Quarry Lane Pleasanton,CA 94566 <br /> A pah of Sewm Tmnt rqc Tel 925 484 11919 Fax 925 484 1096`www stl inc com•CA DHS ELAP#2496 Page 25 of 28 <br />