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SSubmission# 2004-01-0751 <br /> IL <br /> Gas/BTEXFuel Oxygenates by 8260B (High Level) <br /> Treadwell & Rollo-Orinda <br /> Attn Brian Moore <br /> 2 Theater Square, Suite 216 l <br /> Onnda, CA 94563 l <br /> Phone (925)253-4980 Fax (925)253-4985 <br /> Project 259710 Received 01/15/2004 <br /> Stockton_Carado Site <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 82606 <br /> Laboratory Control Spike Soil QC Batch#2004101129-03 69 <br /> LCS 2004101129-03 69-038 Extracted 01/29/2004 Analyzed 01/29/2004 12 38 <br /> LCSD 2004101129-03 69-003 Extracted 01/29/2004 Analyzed 01/29/2004 13 03 <br /> Compound Conc ug/Kg Exp Conc I Recovery% RPD Ctri Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 9600 9680 10000 960 968 08 69-129 20 <br /> Toluene 9380 9490 10000 938 949 12 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 9280 10100 10000 928 101 0 85 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 239 243 250 956 972 70-121 <br /> Toluene-d8 242 1246 1250 1968 984 1 81-117 r <br /> i I <br /> I <br /> r - <br /> Severn Trent Laboratories, Inc 01/29/2004 16 05 <br /> STL San Francisco*1220 Quarry Lane Pleasanton CA 94566 [ <br /> A part of Sevem TcontPlo Tel 925 484 1919 Fax 925 484 1096*www sti-inc corn*CA DHS FLAP*2496 Page 4 of 5 <br /> �_y <br />