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TLSubmission# 2004-02-0733 <br /> Gas/BTEX 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 /> Protect 41050001 FA20 Received 02/24/2004 16 50 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd <br /> Batch QC Re ort <br /> Prep(s) 50306 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004103103-1B 64 <br /> LCS 2004103103-1 B 64-046 Extracted 03/03/2004 Analyzed 03/03/2004 07 46 <br /> LCSD 2004/03/03-16 64-008 Extracted 03/03/2004 Analyzed 03/03/2004 08 08 - <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) 220 21 1 25 880 844 42 65-165 20 <br /> Benzene 221 227 25 884 908 2 7 69-129 20 <br /> Toluene 243 24 6 25 972 984 1 2 70-130 20 <br /> Surrogiates(s) <br /> 1,2-Dichloroethane-d4 383 383 500 766 766 76-114 <br /> Toluene-d8 490 489 500 980 97 8 88-110 <br /> Severn Trent Laboratories, Inc 03/08/2004 13 40 <br /> STL San Francisco*1220 Quarry Lane Pleasanton CA 94566 <br /> A Part Of Sevem Trern Pk Tel 925 484 1919 Fax 925 484 1096*www stl-inc corn*CA DHS FLAP#2496 Page 12 of 15 <br />