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STLSubmission# 2003-10-0434 <br /> Gas/BTEX Fuel Oxygenates by 8260E <br /> TRC Alton Geoscience <br /> Attn Anju Farfan <br /> 21 Technology Dnve <br /> Irvine,CA 92718 <br /> Phone (949)341-7440 Fax (949)753-0111 <br /> Project 410500-01 Received 101101200315 37 <br /> 01205 <br /> Site 16470 Cambridge St.Lathrop CA <br /> Batch QC Report - - <br /> Prep(s) 5030B J _ Test(g) 8260FA13 <br /> Laboratory Control Spike Water QC Batch#2003/10/23-01 68 <br /> LCS 2003110/23-0168-027 Extracted 10/2312003 Analyzed 10/2312003 1127 <br /> LCSD 2003/10123-01 68-047 Extracted 10/23/2003 Analyzed 10123120031147 <br /> Compound Conn: u911- Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCs LCSD LOS LCSD % Rec RPD LCS LCSD <br /> • Benzene 225 224 250 90 0 896 04 69-129 20 <br /> Toluene 234 235 250 936 940 04 70-130 20 <br /> Methyl tent-butyl ether(MTBE) 228 218 250 012 872 45 65-165 20 <br /> Surrowte4s) <br /> 1,2-Dichloroelhane-d4 505 496 500 1010 992 76-114 <br /> Toluene-d8 515 532 500 11030 11064 88-110 <br /> Sevem Trent Laboratories, Inc I=4rz00314 01 <br /> STL San Francisco`1220 Quarry Lane Pleasanton CA 94566 <br /> ^AM-fcn Tft tF% Tel 925 484 1919 Fax 926 484 1096'www atl-Inc cwm'CA DNS ELAP4 2496 Page 12 of 13 <br />