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Submission 2005-04.0610 <br /> S-1 TL <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <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 04/19/2005 15 55 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Rd , Stockton <br /> Batch QC Report <br /> Prep(s) 5030E Test(s) 82608 <br /> Laboratory Control Spike Water QC Batch#2005!04/29-2A 62 <br /> LCS 2005104129-2A 62-039 Extracted 04/29/2005 Analyzed 04129/2005 19 39 <br /> LCSD <br /> Compound Cot1c ug/L Exp Conc Recovery% RPD Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tent-butyl ether(MTBE) 237 25 948 65-165 20 <br /> Benzene 301 25 1204 69-129 20 <br /> Toluene 307 25 1228 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 523 500 1046 73-130 <br /> Toluene-l8 511 500 1022 81-114 <br /> Severn Trent Laboratories, Inc 05/03/2005 14 49 <br /> STL San Francisco'1220 Quarry Lane Pleasanton,CA 94566 <br /> A Pert of Severn Trenl Plc Tel 925 484 1919 Fax 925 484 1096`Www stE-inc con!'CA CMS ELAP#2496 Page 16 of 24 <br />