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N <br /> ' STL Submission 2005-04-0610 <br /> GasIBTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <br /> Attn Antu Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 04/19/2005 15 55 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Rd , Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 82608 <br /> Matrix Spike( MS/ MSD) Water QC Batch#2005105102-2A 68 <br /> MS/MSD Lab ID 2005-04-0740 -008 <br /> MS 2005!05/02-2A 68-OD9 Extracted 05/02/2005 Analyzed 0510212005 2109 <br /> Dilution 1 00 <br /> MSD 2005105/02-2A 68-027 Extracted 0 510212 0 05 Analyzed 05/02/2005 21 27 <br /> Dilution 1 00 • <br /> Compound Conc u /L Spk Level Recovery% Limits% Flags <br /> M5 MSD Sample u !L MS MSD RPD Rec RPD MS MSD <br /> Benzene 254 270 ND 25 1016 1080 61 69-129 20 <br /> Toluene 274 288 0 562 25 1074 1130 51 70-130 20 <br /> Methyl tert-butyl ether 313 329 576 25 1022 1086 61 1 65-165 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 428 425 500 856 850 73-130 <br /> Toluene-d8 455 444 l 1 500 1910 1888 1 81-114 <br /> Severn Trent Laboratories, Inc 05/03/2005 14 4 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A per[nf Save-Trent Pie Tel 925 484 1919 Fax 925 484 1096'www sti-inc com'CA DHS ELAP#2496 Page 23 of 24 <br />