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Submission 2004-08-0291 <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 410500011FA20 Received 08/11/2004 17 16 <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 #2004108/20-11 A 64 <br /> LCS 2004108120-1A 64-010 Extracted 08/20/2004 Analyzed 08/20/2004 06 10 <br /> LCSD 2004108120-1A 64-032 Extracted 08/20/2004 Analyzed 08/20/2004 06 32 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% FlaIL <br /> LCS LCSD LCS LCSD % Rec RPD LCS CSD <br /> Methyl tert-butyl ether(MTBE) 221 234 25 884 936 57 65-165 20 <br /> Benzene 233 23 8 25 93 2 952 2 1 69-129 20 <br /> Toluene 237 238 25 948 952 0 4 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 495 493 500 99 0 986 72-128 <br /> Toluene-d8 499 497 500 998 994 80-113 <br /> Severn Trent Laboratories, Inc <br /> 08/23/2004 09 410 <br /> STL San Francisco'1220 Quarry Lane Pleasanton,CA 94566 <br /> A part of Sevem Trent Pk Tel 925 484 1919 Fax 925 484 1096`www sti-inc com`CA DHS EiAP#2496 Page 19 of 20 <br />