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,a <br /> Submission 2004-08-0169 <br /> MW C!0 a M14 � S Tr 1 L <br /> GasIBTEX Fuel Oxygenates by 8260B • <br /> TRC Afton 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 08/05/2004 18 30 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Rd , Stockton <br /> Batch QC Report <br /> Prep(s) 50305 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004108/12-02 64 <br /> LCS 2004108112-02 64-011 Extracted 08/12/2004 Analyzed 08/12/2004 19 11 <br /> LCSD 2004108112-02 64-055 Extracted 08/12/2004 Analyzed 08/12/2004 19 55 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 220 234 25 0 68 0 936 62 69-129 20 • <br /> Toluene 236 259 250 94 4 1036 9 3 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 254 264 250 1016 1056 3 9 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 506 507 500 1012 1014 72-128 <br /> Toluene-d8 497 502 500 1994 1004 80-113 <br /> Severn Trent Laboratories, Inc 08/17/2004 13 300 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apart of Severn TmN Pic Tel 925 484 1919 Fax 925 484 1 096'www stl-mc com'CA DHS ELAP#2496 Page 15 of 18 <br />