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r <br /> STLSubmission# 2004-02-0466 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <br /> Attn Anju Farfan <br /> 21 Technology Drive <br /> Irvine,CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 02/13/2004 15 51 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Rd , Stockton <br /> Batch QC Report <br /> Prep(s) 5030E Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004/02/21-1 C 64 <br /> LCS 2004102121-1C 64-044 Extracted 02/21/2004 Analyzed 02/21/2004 08 44 <br /> LCSD 2004102121-1C 64-007 Extracted 02/21/2004 Analyzed 02/21/2004 09 07 <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) 226 21 4 25 904 856 55 65-165 20 <br /> Benzene 25 7 249 25 1028 996 32 69-129 20 <br /> Toluene 25 9 25 6 25 1036 1024 1 2 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 398 382 500 796 764 76-114 <br /> Toluene-d8 469 477 500 1938 M4 88-110 <br /> I <br /> I <br /> i <br /> i <br /> I <br /> I <br /> Severn Trent Laboratories, Inc 0212712004 11 55 <br /> STL San Francisco'1220 Quarry Lane Pleasanton,CA 94566 <br /> Aaan Ofr n,T-1 PL Tel 925 484 1919 Fax 925 484 1096'www stl-inc corn"CA DWS ELAP#2496 Page 14 of 17 <br />