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i <br /> STIr <br /> *L Submission 2005-07-0294 <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 /> Protect 41050001 FA20 Received 07/12/2005 18 00 <br /> Conoco Phillips#4409 <br /> Site 1502 N EI Dorado St Stockton <br /> i <br /> W Batch QC Report <br /> a' <br /> Prep(s) 5030B � � Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch#2005!47!23-2A 62 <br /> LCS 2005107123-2A 62-003 - Extracted 07123/2005 Analyzed 07/2312005 18 03 e <br /> LCSD 2005107/23-2A 62-034 _ Extracted 07/24/2005 __M W Analyzed 07/2412005 04 34 <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) 21 6 223 25 86 4 892 32 65-165 20 <br /> Benzene 218 234 25 872 936 71 69-129 20 <br /> Toluene 233 238 25 932 952 2 1 70-130 20 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-l4 425 444 500 850 888 73-130 <br /> Toluene-d8 454 435 500 90 8 87 0 81-114 <br /> 1 1 <br /> Severn Trent Laboratories, Inc 07/28/2005 17 27 <br /> STL San Francisco-1220 Quarry Lane Pleasanton CA 94566 <br /> Apar[a Savor Tient Plc Tel 925 484 1919 Fax 925 484 1096*www sll-inc corn*CA 0HS ELAP#2496 Page 29 of 41 <br />