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M <br /> r � o STL Submission 2004-11-0824 <br /> GasIBTEX 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 /> Protect 41050001 FA20 Received 11/29/2004 10 55 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd , Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004112/04-1 B 64 <br /> LCS 2004112104-1 B 64-049 Extracted 12/04/2004 Analyzed 12/04/2004 06 49 <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) 25 0 25 1000 65-165 20 <br /> Benzene 23 7 25 948 69-129 20 <br /> Toluene 24 1 25 964 70-130 20 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 446 500 892 73-130 <br /> Toluene-d8 438 500 1876 81-114 <br /> Severn Trent Laboratories, Inc 1210812004 18 40 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton CA 94566 <br /> A part of Severn Trent Pk Tel 925 484 1919 Fax 925 484 1096'www stl inc corn'CA DHS FLAP#2496 Page 19 of 25 <br />