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Submission 2005-07-0294 <br /> • Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience-Irvine <br /> Attn Anju Far-fan <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 /> Site 1502 N EI Dorado St Stockton <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260E <br /> I Matrix Spike(MS 1 MSD y Water QC Batch#2005107125-2A 68 <br /> MW-10 » MS Lab ID 2005-07-0294-010 <br /> MS 2005107!25-2A 68-012 Extracted 07/25/2005 Analyzed 07/25/2005 20 12 <br /> Dilution 4000 <br /> MSI] 2005107125-2A 68-041 Extracted 07/25/2005 Analyzed 0712512005 20 41 <br /> Dilution _ 4000 <br /> Compound Conc uglL Spk Leve Recove % Limns% Fla s <br /> MS MSD Sample u /L MS MSD RPD Rec RPD MS MSD <br /> Methyl tent-butyl ether 3710 3560 2590 1000 1120 970 144 65-165 20 <br /> Benzene 932 912 NO 1000 932 912 22 69-129 20 <br /> Toluene 955 955 NO 1000 955 955 00 70-130 20 <br /> surrogate(s) <br /> 1 2-Dichloroethane-d4 425 423 500 850 846 73-130 <br /> Toluene-d8 504 503 500 1008 11006 81-114 <br /> I <br /> Severn Trent Laboratories, Inc 07/28MO517 27 <br /> STL San Francisco• 1220 Quart'Lane Pleasanton CA 94566 <br /> Apartof Sw—Trent Plc Tel 925 484 1919 Fax 925 484 1096*www stl-inc com*CA DHS ELAP#2496 Page 39 of 41 <br />