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� STL <br /> Submission # 2004-09-0240 <br /> GasIBTEX Fuel Oxygenates by 82608 <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) 50306 Test(s) 82606 <br /> Laboratory Control Spike Water QC Batch #2004109110-1D 68 <br /> LCS 2004109110-1 D 68-010 Extracted 09/10/2004 Analyzed 09/10/2004 07 10 <br /> LCSD 2004109110-1 D 68-029 Extracted 09/10/2004 Analyzed 09/10/2004 07 29 <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) 267 275 25 1 06 8 1100 30 65-165 20 <br /> Benzene 254 26 7 25 1016 1068 5 0 69-129 20 <br /> Toluene 253 263 25 101 2 1052 3 9 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 450 473 500 900 94 6 72-128 <br /> Toluene-d8 499 520 500 998 1040 80-113 <br /> Severn Trent Laboratories, Inc 09/21/2004 16 09 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton CA 94566 <br /> Apart of Severn Trent Pie Tel 925 484 1919 Fax 925 484 1096'www stl-inc com"CA DHS ELAP#2496 Page 14 of 16 <br />