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ST L Submission # 2004-07-0315 <br /> a <br /> GasIBTEX Fuel Oxygenates by 8260B , <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 /> Protect V6100 Received 07/13/2004 09 30 <br /> 6100 <br /> Site Patterson Pass Road, Tracy <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch #2004/07/14-1 C 62 <br /> LCS 2004107114-1 C 62-057 Extracted 07/14/2004 Analyzed 07/14/2004 06 57 <br /> LCSD 2004107114-1 C 62-022 Extracted 07/14/2004 Analyzed 07/14/2004 08 22 <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) 223 206 25 892 824 79 65-165 20 <br /> Benzene 236 235 25 944 940 0 4 69-129 20 <br /> Toluene 24 7 250 25 988 1000 1 2 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 396 380 500 792 760 72-128 <br /> Toluene-d8 466 462 500 932 924 80-113 <br /> Severn Trent Laboratories, Inc 07/19/2004 16 38 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096*www stl-inc com *CA DHS ELAP#2496 Page 11 of 12 <br />