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STLSubmission 2005-10-0397 <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 410500011FA20 Received 10/17/2005 17 45 <br /> Conoco Phillips#08671 <br /> Site 8606 Thorton <br /> Batch QC Report <br /> Prep(s). .50308 Test(s) 8260B <br /> Matrix Spike( MS 1 MSD) Water QC Batch#2005110121-1A-65 <br /> MW-4 >>MS Lab ID 2005-10-0397-010 <br /> MS 2005110121-1A65-056 Extracted 10/21/2005 Analyzed. 10121/200511 56 <br /> Dilution 50-00 <br /> MSD 2005/10/21-1A.65-022 Extracted 10/2112005 Analyzed 10121/20051222 <br /> Dilution T 5000 <br /> Compound Conc ug/L Splk Leve Recove % Limits% Fla s <br /> M5 MSD Sample u IL MS MSD RPD Rec RPD MS MSD <br /> Methyl tert-butyl ether 16700 15600 16000 1250 560 -320 733 65-165 20 M3 M5 M3 R1,M5 <br /> Benzene 1300 1270 335 1250 1037 1013 23 69-129 20 <br /> Toluene 1320 1290 612 1250 1051 1027 23 70-130 20 <br /> surrogates) <br /> 1 2-Dichloroethane-d4 431 395 500 862 790 73-130 <br /> Toluene-d8 458 455 500 916 910 81-114 <br /> i <br /> Severn Trent Laboratories, Inc 10/2912005 12 35 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94565 <br /> A;--t of Swv Tnnt Pi. Tel 925 484 1919 Fax 925 484 1096"www stl-inc com"CA DHS FLAP#2496 Page 18 of 21 <br />