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STL <br /> Submission# 2004-02-0435 <br /> f <br /> GasIBTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <br /> Attn Antu Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 02/12/2004 18 26 <br /> Conoco Phillips# 5886 <br /> Site 2701 West March Lane, Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004102119-02 69 <br /> LCS 2004102119-02 69-022 Extracted 02/19/2004 Analyzed 02/19/2004 18 22 <br /> LCSD 2004102119-02 69-041 Extracted 02119/2004 Analyzed 02/19/2004 18 41 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 226 21 4 25 0 904 856 55 69-129 20 <br /> Toluene 231 222 250 924 88 8 4 0 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 254 236 250 1016 94 4 73 65-165 20 <br /> Surrogates(s) <br /> Toluene-d8 486 489 500 972 978 88-110 <br /> 1 2-Dichloroethane-d4 1468 1434 1500 93 6 1868 76-114 <br /> Severn Trent Laboratories, Inc 02/25/2004 10 57 <br /> STL San Francisco-1220 Quarry Lane,Pleasanton CA 94566 Page 24 of 27 <br /> A Part of Severn Trent Pk Tel 925 484 1919 Fax 925 484 1096 a www stl-Inc com"CA DHS FLAP#2496 <br />