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s <br /> ` STL Submission # 2004-09-0240 <br /> GasBTEX 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 BP Facility No 6100 Received 09/09/2004 09 40 <br /> Site Petterson Pass Rd <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch # 20041091110-1113 65 <br /> LCS 2004109110-1 B 65-042 Extracted 09/10/2004 Analyzed 09/10/2004 10 42 <br /> LCSD 2004109110-1 B 65-008 Extracted 09/10/2004 Analyzed 09/10/2004 12 08 <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) 267 236 25 1068 944 123 65-165 20 <br /> Benzene 183 177 25 732 708 3 3 69-129 20 <br /> Toluene 21 3 178 25 852 71 2 179 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 512 509 500 1024 101 8 72-128 <br /> Toluene-d8 436 414 500 872 828 80-113 <br /> Severn Trent Laboratories, Inc 09/21/2004 16 09 <br /> STL Sail Francisco*1220 Quarry Lane Pleasanton,CA 94566 <br /> A part of Severn Trent Poc Tel 925 484 1919 Fax 925 484 1096*www stkno tom*CA DHS ELAP#2496 Page 13 of 16 <br />