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® STL Submission 2005-01-0034 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geosclence-Irvine <br /> Attn Anju Farfen <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949)341-7440 Fax (949)753-0111 <br /> Project 410500011FA20 Received 01/03/2005 14 00 <br /> Conoco Phillips#6981 <br /> Site 4707 Pacific Ave,Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Teit(s):8260B <br /> Laboratory Contro]Spike Water QC Batch 9 200V01/07 2B 64 <br /> LCS 2005101107-2B 64-008 Extracted 01107/2005 Analyzed 01/Q7/2005 17 08 ' <br /> LCSD <br /> Compound Cone ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec I RPD LCS LCSD <br /> Methyl tort-butyl ether(MTBE) 234 25 936 55-165 20 <br /> • Benzene 241 25 964 69-129 20 <br /> Toruene 24 9 25 996 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dlchloroethane-d4 474 500 948 73-130 <br /> Toluene-d8 1491 1 1500 1982 61-114 <br /> • Severn Trent Laboratories, Inc <br /> 011171200513 31 <br /> STL San Francisco-1220 Quarry Lane,Pleasanton,CA 94566 <br /> AWur 8"M rnnl Vt Tet 925 484 1919 Fax 925 404 1 096 1 www sil-ine corn'CA DHS ELAP#2496 Page 22 of 27 <br />