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TLSubmission# 2004-02-0435 <br /> GasBTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geosctence <br /> Attn Anlu Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949)753-0111 <br /> Protect 41050001 FA20 Received 02/12/2004 18 26 <br /> Conoco Phillips#5886 <br /> ` Site 2701 West March Lane, Stockton ` <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#20041102120-1 B 64 <br /> LCS 2004102120-1 B 64-058 Extracted 02/20/2004 Analyzed 02/20/2004 09 58 <br /> LCSD 2004102120-1 B 64-021 Extracted 02/20/2004 Analyzed 02/20/2004 10 21 <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) 221 -- 21-5= 25- _ 88 4 -86 0--- 2 8 65=165 —20- <br /> Benzene <br /> 20-Benzene 257 244 25 1028 976 52 69-129 20 <br /> Toluene 254 246 25 1016 984 32 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 394 395 500 788 790 76-114 <br /> Toluene-d8 474 482 500 94 8 964 88-110 <br /> Severn Trent Laboratories, Inc 021251200410 570 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A pan of Severn Tien[Pk Tel 925 484 1919 Fax 925 484 1096"www sti-inc corn"CA DHS ELAP#2496 Page 25 of 27 <br />