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® STL Submission 2005-01-0750 <br /> i <br /> 0 <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 410500011FA20 Received 01/27/2005 14 55 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Rd , Stockton <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 8260B <br /> Matrix Spike ( MS 1 MSD] Water QC Batch #2005102109-2D 68 <br /> MS/MSD Lab ID 2005-02-0106-004 <br /> MS 2005102/09-20 68-009 Extracted 02/09/2005 Analyzed 02/09/2005 20 09 <br /> Dilution 100 <br /> MSD 2005/02109-2D 68-026 Extracted 02/09/2005 Analyzed 02/09/2005 20 26 <br /> Dilution 100 <br /> Compound Conc u L Spk Level Recove % Limits% Flags <br /> MS MSD Sample u L MS MSD RPD Rec RPD MS MSD <br /> Methyl tert-butyl ether 255 271 ND 25 1020 1084 61 65-165 20 <br /> Benzene 251 241 ND 25 1004 964 41 69-129 20 <br /> Toluene 258 258 ND 25 1032 1032 00 1 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichiaroethane-d4 519 506 500 1038 1012 73-130 <br /> Toluene-d8 556 552 500 111 2 1104 81-114 <br /> Severn Trent Laboratories, Inc 021111200511 55 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton CA 94566 <br /> Apert at$w mhent Pic Tel 925 484 1919 Fax 925 484 1096"www stl-inc corn"CA DHS ELAP#2496 Page 20 of 21 <br />