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STL <br /> Submission # 2003-12-0040 <br /> a <br /> • GasIBTEX Fuel Oxygenates by 8260E - <br /> TRC Alton Geoscience <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 12/01/2003 17 17 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd Stockton <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch#2003/12105-2113 69 <br /> LCS 2003112105-2B 69-024 Extracted 12/05/2003 Analyzed 12/05/2003 18 24 <br /> LCSD 2003112105-213 69-042 Extracted 12/05/2003 Analyzed 12/05/2003 18 42 <br /> Compound Cone uglL Exp Conc Recovery% RPDJ Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 234 249 25 936 99 6 62 69-129 20 <br /> Toluene 280 280 25 1120 1120 0 0 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 234 245 25 936 980 4 6 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 435 449 500 87 0 898 76-114 <br /> Toluene-d8 478 508 500 95 6 11016 1 88-110 <br /> Severn Trent Laboratories, Inc 12/11/2003 17 29 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> AWOI 8—.m 7,eM Plc Tel 925 484 1919 Fax 925 484 1096"www stl-inc corn`CA DHS ELAP*2496 Page 19 of 23 <br />