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•f fr <br /> � STT Submission# 2004-02-0755 <br /> R� GasIBTEX Fuel Oxygenates by 82606 <br /> TRC Alton Geoscience <br /> Attn Anlu 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 25 <br /> Conoco Phillips# 11192 <br /> Site 1403 Country Club Blvd Stockton <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch #2004103106-1D 65 <br /> LCS 2004103106-1 D 65-026 Extracted 03/06/2004 Analyzed 03/06/2004 08 26 <br /> LCSD 2004/03106-1 D 65-050 Extracted 03/06/2004 Analyzed 03/06/2004 08 50 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 25 2 235 25 1008 94 0 7 0 65-165 20 <br /> . Benzene 25 5 227 25 1020 908 11 6 69-129 20 <br /> Toluene 25 0 237 25 1000 94 8 53 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 424 400 500 848 80 0 76-114 <br /> Toluene-d8 468 445 500 93 6 1890 1 1 88-110 <br /> Severn Trent Laboratories, Inc 03/0812004 16 31 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> Apart of Severn Trent Pk Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS ELAP#2496 Page 12 of 13 <br />