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I <br /> S T <br /> T L Submission 2004-08-0648 <br /> Gas/BTEXFuef Oxygenates by 8260B <br /> H2OGeo1 <br /> Attn Gary Lowe <br /> PO Box 2165 <br /> Livermore, CA 94551-2165 <br /> Phone (925) 373-9211 Fax ( ) - <br /> Protect Former Donna Gardner Property Received 08/25/2004 11 00 <br /> Site 26056126080 Thornton Road N, Thornton, <br /> CA <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch#2004109101-1B 64 <br /> LCS 2004109/01-16 64-046 Extracted 09/01/2004 Analyzed 09/01/2004 08 46 <br /> LCSD 2004/09101-1B 64-001 Extracted 09/01/2004 Analyzed 09/01/2004 08 01 <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) 21 2 243 25 848 972 136 65-165 20 <br /> Benzene 230 238 25 920 952 34 69-129 20 <br /> Toluene 246 239 25 984 956 2 9 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dlchloroethane-d4 508 566 500 1016 1132 72-128 <br /> Toluene-d8 516 540 500 1032 11080 80-113 <br /> Severn Trent Laboratories, Inc 09/01/2004 17 10 <br /> STL Sart Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A part or Severn Trent Pt Tel 925 484 1919 Fax 925 484 1096'www stl-inc com"CA DHS FLAP#2496 Page 5 of 6 <br />