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r.I 4 <br /> STLSubmission 2005-03-0010 <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 41050001 FA20 Received 02/28/2005 15 05 <br /> Conoco Phillips# 11192 <br /> Site 1403 Country Club Blvd Stockton <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 82606 <br /> Matrix Spike( MS I MSD ) Water QC Batch #2005103110-2A 65 <br /> MSIMSD Lab ID 2005-03-0017-001 <br /> MS 2005103110-2A 65-003 Extracted 03/10/2005 Analyzed 03/10/2005 2103 <br /> Dilution 100 <br /> MSD 2005/03/10-2A 65-027 Extracted 03/10/2005 Analyzed 03/10/2005 21 27 <br /> Dilution 100 <br /> Compound <br /> Conc ug 1L S.pk Level Recove % Limits% Figs <br /> MS MSD Sample .91L MS MSD RPD Rec RPD MS MSD <br /> Methyl tert butyl ether 223 257 NO 25 892 1028 142 65-165 20 <br /> Benzene 228 283 NO 25 912 1132 215 69-129 20 R1 <br /> Toluene 241 29 3 NO 25 96 4 1172 195 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 442 430 500 884 860 73-130 <br /> Toluene-d8 462 464 500 92 4 928 81-114 <br /> Severn Trent Laboratories, Inc 03115/2005 09 29 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> Apart of Severn Tre JPlc Tel 925 484 1919 Fax 925 4134 1096'www sti-inc com'CA DHS ELAP#2496 Page 31 of 35 <br />