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STLSubmission # 2004-08-0026 <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 U6100 Received 08/03/2004 09 50 <br /> 6100 <br /> Site 25775 Patterson Pass Rd <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 82606 <br /> Laboratory Control Spike Water QC Batch #2004108104-11C 66 <br /> LCS 2004108/04-1 C 66-049 Extracted 08/04/2004 Analyzed 08/04/2004 06 49 <br /> LCSD 2004108104-1 C 66-011 Extracted 08/04/2004 Analyzed 08/04/2004 07 11 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> i <br /> Methyl tert-butyl ether(MTBE) 278 269 25 111 2 1076 33 65-165 20 <br /> Benzene 260 263 25 1040 1052 1 1 69-129 20 <br /> Toluene 270 258 25 1080 1032 4 5 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 454 444 500 908 888 72-128 <br /> Toluene-d8 500 497 500 1000 994 80-113 <br /> Severn Trent Laboratories, Inc 08/13/2004 12 08 <br /> STL San Francisco* 1220 Quarry Lane,Pleasanton CA 94566 <br /> Apart of S—arn Trent Plc Tel 925 484 1919 Fax 925 484 1096*www stl-inc com*CA DHS ELAP#2496 Page 13 of 16 <br />