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Sof <br /> TL Submission# 2004-02-0733 <br /> • Gas1BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <br /> Attn Anju Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 02/24/2004 16 50 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004103104-1 B 64 <br /> LCS 2004103104-1 B 64-051 Extracted 03/04/2004 Analyzed 03/04/2004 07 51 <br /> LCSD 2004103104-1 B 64-013 Extracted 03/0412004 Analyzed 03/04/2004 08 13 <br /> Compound Conc uglL Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 205 21 2 25 820 848 34 65-165 20 <br /> Benzene 225 222 25 900 888 1 3 69-129 20 <br /> Toluene 248 241 25 992 964 29 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dtchloroethane-d4 385 362 500 770 764 76-114 <br /> Toluene-d8 1499 1493 500 1998 1986 1 88-110 <br /> Severn Trent Laboratories, Inc 03/08/2004 13 40 <br /> STL San Francisco*1220 Quarry Lane Pleasanton CA 94566 Page 14 of 15 <br /> A W of Swam Trent P! Tel 925 484 1919 Fax 925 484 1096`www sti-inc com'CA DHS ELAP#2496 <br />