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' Submission 2005-04-0610 <br /> STL GasIBTEX Fuel Oxygenates by 82606 <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 41050001FA20 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) 8260B <br /> Matrix Spike ( MS/MSD ] Water QC Batch#2005104129-2A 62 <br /> MS/MSD Lab ID 2005-04-0528 - 003 <br /> MS 2005104129-2A 62-056 Extracted 04/29/2005 Analyzed 0412912005 21 56 <br /> Dilution 1 00 <br /> MSD 2005104129-2A 62-022 Extracted 04129/2005 Analyzed 04/2912005 22 22 <br /> Dilution 1 00 <br /> Compound Conc ug!L Spk Level Recove % Limits% Flags <br /> MS MSD Sample u 1L Ms MSD RPD Rec RPD M5 MSD <br /> Methyl tart-butyl ether 284 285 NO 25 1136 1140 04 65-165 20 <br /> Benzene 336 328 NO 25 1344 1312 24 69-129 20 M4 M4 <br /> Toluene 348 325 ND 25 1392 1300 68 70-130 20 M4 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 518 547 500 1036 1094 73-130 <br /> Toluene-d8 525 527 500 11050 11054 81-114 <br /> Severn Trent Laboratories, Inc 05103120051449 <br /> STL San Francisco` 1220 Quarry Lane Pleasanton CA 94566 <br /> A part of Sevem Trent Plc Tel 925 484 1919 Fax 925 484 1096"www stl-inc com"CA DHS ELAP#2496 Page 20 of 24 <br />