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r <br /> ®� STL Submission 2004-08-0291 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <br /> Attn An)u Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001/FA20 Received 08111120041716 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Boulevard, Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004108118-1C 66 <br /> i <br /> LCS 2004/08/18-1C 66-023 Extracted 08/18/2004 Analyzed 08/18/2004 06 23 <br /> LCSD 2004108118-1 C 66-046 Extracted 08/18/2004 Analyzed 08/18/2004 06 46 <br /> Compound Cone ug/L Exp Cone Recovery% IRPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tent-butyl ether(MTBE) 232 243 25 928 972 46 65-165 20 <br /> Benzene 248 25 4 25 99 2 101 6 2 4 69-129 20 <br /> Toluene 247 246 25 98 8 984 0 4 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 419 434 500 83 8 668 72-928 <br /> Toluene-d8 458 463 500 91 6 926 80-113 <br /> Severn Trent Laboratories, Inc 08123/20040941 • <br /> STL San Francisco*1220 Quarry Lane Pleasanton CA 94566 <br /> A pxe of StVe,n T,enl PIC Tel 925 484 1919 Fax 925 484 1095*www sti-ino corn*CA DHS FLAP#2496 Page 17 of 20 <br />