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I <br /> Submission 2005-07-0294 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <br /> Attn An1u t=artan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949)753-0111 <br /> Project 41050001 FA20 Received 07/12/2005 18 00 <br /> Conoco Phillips#4409 <br /> I <br /> Site 1502 N EI Dorado St Stockton <br /> Batch QC Report w <br /> Prep(s) 50308 Test(s) 82606 <br /> Laboratory Control Spike ' r Water QC Batch#2005107125-2A 68 g <br /> I LCs 2005!07125-2A 88-024 Extracted 07125/2005 Analyzed 07/2512005 18 24 , <br /> LCSD 2005107125-2A 68-016 Extracted 07/25/2005 w� Analyzed07/2512005 19 16 _ <br /> Compound Conc ug/L Exp Cone Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS 1 LCSD <br /> Methyl tert-butyl ether(MTBE) 221 21 2 25 884 848 42 65-165 20 <br /> Benzene 222 218 25 888 872 18 69-129 20 <br /> Toluene 228 231 25 912 924 13 70-130 20 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 442 419 500 884 838 73-130 <br /> Toluene-d8 501 512 500 11002 11024 1 81-114 <br /> • Severn Trent Laboratories, Inc 07/28/2005 17 27 <br /> STL San Francisco- 1220 Quarry Lane Pleasanton,CA 94566 <br /> A Pan dSe"M Trent Pl- Tel 925 484 1919 Fax 925 484 1096*www stl-inc corn*CA OHS FLAP#2496 Page 31 of 41 <br />