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OEM STL <br /> Submission 2004-09-0912 <br /> Fuel Oxygenates by 8260B <br /> RMC Pacific Materials, Inc <br /> Attn Robert Aldenhuysen <br /> P O Box 5252 <br /> Pleasanton, CA 94566 <br /> Phone (925)426-2261 Fax (925)426-2231 <br /> Project Kerlinger Received 09/30/2004 18 12 <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260E <br /> i <br /> Laboratory Control Spike Water QC Batch #2004110107-02 68 <br /> LCS 2004110107-02 68-047 Extracted 10/07/2004 Analyzed 10/07/2004 18 47 <br /> LCSD 2004110107-02 68-006 Extracted 10/07/2004 Analyzed 10/07/2004 19 06 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 229 234 25 0 916 936 22 69-129 20 <br /> Toluene 227 24 3 25 0 908 97 2 6 8 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dic2-Dichloroethaned4 481 492 500 962 984 72-128 <br /> Toluene-d8 479 500 500 958 1000 80-113 <br /> Severn Trent Laboratories, Inc 10108/2004 17 56 <br /> STL San Francisco'1220 Quarry Lane Pleasanton,CA 94566 <br /> A ran Of sacerq Trent Plc Tel 925 484 1919 Fax 925 484 1096*www sti-inc com*CA DHS FLAP#2496 Page 8 of 8 <br />