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STT Submission 2005-10-0397 <br /> GasIBTEX Fuel Oxygenates by 82606 <br /> TRC Alton Geosclence- Irvine <br /> Attn Antu Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949)753-0111 <br /> Protect 41050001/FA20 Received 10/17/2005 17 45 <br /> Conoco Phillips#08671 <br /> Site 8606 Thorton <br /> Batch QC Report_ <br /> Prep(s)- 5030E Test(s),8260B <br /> 3 <br /> Laboratory Control Spike Water QC Batch#2005/10122-1AM <br /> LCS 2005/10122-1A 71-049 Extracted 10/22/2005 Analyzed 101221200514 46 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS 1LCSQ <br /> Methyl tert-butyl ether(MTBE) 228 25 912 65-165 20 <br /> Benzene 25 5 25 1020 69-129 20 <br /> Toluene 247 25 988 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 464 500 928 73-130 <br /> Toluene-d8 529 500 1058 81-114 <br /> Severn Trent Laboratories, Inc <br /> 10/2912005 12 35 <br /> STL San Francisco"1220 Quarry Lane Pleasanton CA 94566 <br /> A Part d satyrs,Tront Pk Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS FLAP#2496 Page 17 of 21 <br />