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~ EMS STL Submission # 200440-0224 <br /> . Gas/BTEX 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 Project#6100 Received 10/07/2004 09 30 <br /> Site 25775 Patterson Pass Rd <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 82606 <br /> Laboratory Control Spike Water QC Batch #2004110!08-2A 66 <br /> LCS 2004110108-2A 66-030 Extracted 10/08/2004 Analyzed 10/08/2004 13 30 <br /> LCSD 2004110108-2A 66-052 Extracted 10/08/2004 Analyzed 10/08/2004 13 52 <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) 234 246 25 936 984 50 65-165 20 <br /> Benzene 227 24 4 25 908 97 6 7 2 69-129 20 <br /> Toluene 214 226 25 85 6 90 4 5 5 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 419 413 500 838 82 6 72-128 <br /> Toluene-d8 480 480 500 960 960 80-113 <br /> Severn Trent Laboratories, Inc 10i22r2ao414 42 <br /> STL San Francisco' 1220 Quarry Lane,Pleasanton,CA 94586 <br /> A pert or sevem Trent Pic Tel 925 484 1919 Fax 925 484 1096"www stl-inc corn'CA DHS ELAP#2496 Page 5 of 5 <br />