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STLSubmission 2005-03-0952 <br /> Fuel Oxygenates by 82608 <br /> CEMEX <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 03130120051816 <br /> Batch QC Report <br /> Prep(s) 5030E Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch#2005104106-01 65 <br /> LCS 2005/04/06-0165-049 Extracted 04/06/2005 Analyzed 04/06/2005 07 49 <br /> LCSD <br /> Compound Cone uglL Exp Cone Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 28 4 250 1136 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 430 500 860 73-130 <br /> Toluene-d8 487 500 974 81-114 <br /> Severn Trent Laboratories, Inc 04/12/2005 14 18 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A part 01 Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096•www stl-inc corn a CA DHS ELAP#2496 Page 8 of 9 <br />