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® Submission 2004-11-0843 <br /> STL t <br /> GasIBTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geosclence- Irvine <br /> Attn Anju Farfan <br /> 21 Technology Dave <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 11/29/2004 18 20 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Road, Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch#2004!12104-2E 64 <br /> MS/MSD Lab ID 2004-11-0840 -003 <br /> MS 2004112!04-2E 64-016 Extracted 12/04/2004 Analyzed 12/04/2004 20 16 <br /> Dilution 1 00 <br /> MSD 2004112104-2E 64-038 Extracted 12/04/2004 Analyzed 12/04/2004 20 38 <br /> Dilution 1 00 . <br /> Compound Conc ug/L Spk Level Recove % Limits% Flags <br /> MS MSD Sample ug/L MS MSD RPD Rec RPD Ms MSD <br /> Benzene 255 27 1 ND 25 1020 1084 61 69-129 20 <br /> Toluene 259 271 ND 25 1036 1084 45 70-130 20 <br /> Methyl tent-butyl ether 28 9 286 ND 25 1156 1144 10 65-165 20 <br /> Surrogate($) <br /> 1 2-Dichloroethane-d4 524 514 500 1049 102 8 73-130 <br /> Toluene-d8 486 490 500 1 97 2 98 1 1 81-114 <br /> Severn Trent Laboratories, Inc <br /> 12!10/2004 17 210 <br /> STL San Francisco*1220 Quant'Lane Pleasanton CA 94566 <br /> A part of S-Trent Pic Tel 925 464 1919 Fax 925 484 1096*www stl-inc com*CA DHS ELAP#2496 Page 21 of 24 <br />