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STLSubmission 2004-10-0851 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <br /> Attn Anju Farfan <br /> 21 Technology Drive <br /> Inane,CA 92718 <br /> Phone (949)341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 10/26/2004 18 00 <br /> Conoco Phillips#4409 <br /> Site 1502 N EI Dorado St , Stockton <br /> Batch QC Report <br /> , <br /> Prep(s) 50308 Test(s) 8260FAB' <br /> Matrix Spike ( MS/MSD} Water QC Batch #2004111!01-2B 64 <br /> E - <br /> MS/MSD Lab ID 2004-10-0829-001 <br /> MS 2004111101-213 64-032 Extracted 11/01/2004 Analyzed 11/01/2004 18 32 <br /> Dilution 1 00 <br /> MSD 2004111101-26 64-055 Extracted 11/01/2004 Analyzed 1110112004`18 55 <br /> Dilution 100 <br /> Compound Conc u IL S k Leve Recove % Limits% Flags <br /> MS MSD Sample u IL MS MSD I RPD Rec RPD MS MSR <br /> Benzene 278 244 ND 25 1112 976 130 69-129 20 <br /> Toluene 286 255 ND 25 1144 1020 115 70-130 20 <br /> Methyl tent-butyl ether 290 276 0 506 25 1140 1084 5 0 65-165 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 462 470 500 924 940 73-130 <br /> Toluene-d8 507 527 500 1014 1054 81-114 <br /> Severn Trent Laboratories, Inc 11/08/2004 13 15 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton CA 94566 <br /> ApaM of Suv m T-1 Pic Tel 925 484 1919 Fax 925 484 1096"www stl-inc cam'CA DHS ELAP#2496 Page 22 of 24 <br />