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STLSubmission# 2003-12-0040 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geosclence <br /> Attn Anju i=arfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949)341-7440 Fax (949)753-0111 <br /> Protect 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) 6030B Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch#2003112/05-1 C 68 <br /> LCS 2003/12/06-1C 68-024 Extracted 1 2/0512 0 0 3 Analyzed, 12/0512003 10 24 <br /> LCSD 2003112/05-1 C 68-059 EXtracted 12/05/2003 Analyzed 12106/2003 10 42 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limas% Flags <br /> LCS LCSD LCS LCSD % Rec I RPD LCS I LCSD <br /> Methyl tert-butyl ether(MTBE) 23 3 216 25 932 864 76 65-165 20 <br /> Benzene 224 221 25 896 $84 1 3 59-129 20 <br /> Toluene 214 211 25 856 844 1 4 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 476 458 500 952 916 76-114 <br /> Toluene-d8 1505 1461 1500 11010 1922 1 88-110 <br /> Severn Trent Laboratories, Inc 12/11/20031729 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton,CA 94566 <br /> Aeon d s.vem Troll plc Tel 925 484 1919 Fax 1925 484 1096-www stklnc com-CA OHS EL+4P*2496 Page 18 of 23 <br />