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STLSubmission # 2004-10-0473 <br /> GasIBTEX Fuel Oxygenates by 82606 <br /> Stratus Environmental Inc <br /> Attn Jay Johnson <br /> 3330 Cameron Park Drive, Suite 550 <br /> Cameron Park, CA 95682 <br /> Phone (530) 676-6007 Fax (530) 676-6005 <br /> Project 25775 S Patterson Pass Rd , Tracy Received 10/15/2004 09 30 <br /> 6100 <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch #2004110116-1A 65 <br /> LCS 2004/10116-1A 65-045 Extracted 10/16/2004 Analyzed 10/16/2004 08 45 <br /> LCSD 2004/10116-1 A 65-010 Extracted 10/16/2004 Analyzed 10/16/2004 09 10 <br /> Compound Conc ug/L Exp Conc Recovery % RPD Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 21 6 225 25 864 900 41 65-165 20 <br /> Benzene 199 240 25 796 96 0 187 69-129 20 <br /> • Toluene 21 3 235 25 85 2 94 0 98 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 501 490 500 1002 98 0 72-128 <br /> Toluene-d8 496 484 500 99 2 968 80-113 <br /> Severn Trent Laboratories, Inc <br /> 11/05/2004 16 34 <br /> STL San Francisco*1220 Quarry Lane, Pleasanton, CA 94566 <br /> A part of Seem Trent Plc Tel 925 484 1919 Fax 925 484 1096*www stl-mc com*CA DHS ELAP#2496 Page 6 of 9 <br />