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61 <br /> STLSubmission 2004-11-0843 <br /> GaslBTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience-Irvine <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 11/29/2004 18 20 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Road, Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004112106-IA 64 <br /> LCS 2004112106-1A 64-001 Extracted 12/06/2004 Analyzed 1210612004 07 01 <br /> LCSD <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) 233 25 932 65-165 20 <br /> Benzene 223 25 892 69-129 20 <br /> Toluene 23 0 25 920 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 474 500 948 73-130 <br /> Toluene-d8 457 500 914 81-114 <br /> Severn Trent Laboratories, Inc 12110/2004 17 21 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part Ofbevern Trent Pic Tel 925 484 1919 Fax 925 484 1096*www sti-inc corn*CA DHS FLAP#2496 Page 18 of 24 <br />