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STLSubmission 2005-10-0232 <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 41050001 FA20 Received 10111/2005 16 20 <br /> Conoco Phillips#4409 <br /> Site 1502 N EI Dorado St Stockton <br /> Batch QC Report <br /> -Prep(s) 50308 - Test(s) 8260B <br /> Matrix Spike(,MS J MSD_) Water QC Batch#2005110115-1B 71 <br /> MS/MSD E r ` w fab ID Y2005=10-0267-0011 <br /> ' <br /> MS 2005110115-11371-020 Extracted 1011512005k Analyzed _ 10/15/2005 12 00 <br /> Dilution - 25`00 <br /> MSD 2045110/15-113371-026 Extracted 10115/2005 Analyzed 3x -'10/1512005 12 26 <br /> Dilution 25 00 <br /> Compound Conc u /L Spk Leve Recove % Limits% Flags <br /> Ms MSD Sam le ug/L MS MSD I RPD Rec RPD MS MSD <br /> Methyl tent-butyl ether 969 1040 402 625 907 1021 11 8 65-165 20 <br /> Benzene 626 637 1 12 625 1000 101 7 1 7 69-129 20 <br /> Toluene 633 622 1 74 625 101 0 992 1 8 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dtchloroethane-d4 421 422 500 84 2 844 73-130 <br /> Toluene-d8 504 488 500 11008 1976 1 81-114 <br /> Severn Trent Laboratories, Inc 10/201200511 12 <br /> STL San Francisco*1220 Quarry Lane Pleasanton CA 94566 <br /> A part d Sowm Trani Pk Tel 925 484 1919 Fax 925 484 1096*www stl-inc com*CA DHS ELAN 2496 Page 20 of 21 <br />