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STLSubmission# 200340-MS <br /> Gas/BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geoscence <br /> Attn An1u Farfan <br /> 21 Technology Drive <br /> Irvine,CA 92718 <br /> Phone (M)341-744O Fax (949)753-0111 <br /> Project. 410500-01 Received 10/10/2003 15 48 <br /> 01205 <br /> Site 16470 Cambridge St, Lathrop CA <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 8260FAS <br /> Laboratory Control Spike Water CC Batch#2003110122-W1,08 <br /> LCS 2003110122-01-68-019 Extracted 1012212003 Analyzed 10/2212003 09.19 <br /> LCSD 2003110/2-2-01 68-044 Extracted"101,2212003 Analyzed 10/22/2003 Og40 <br /> Compound Conc ug1L Exp Cana Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 233 229 250 932 916 17 69-129 20 <br /> Toluene 247 233 25 0 988 932 58 70-130 20 <br /> Methyl cert-butyl ether(MTBE) 235 223 250 940 802 52 65-165 20 <br /> surrogates(s) <br /> 1 2-Dichloroethane-d4 505 503 500 1010 1006 76-114 <br /> Toluene-d8 537 1532 500 11074 11064 1 B8-110 <br /> Severn Trent Laboratories, Inc 10424/2003 Dg 15 <br /> STL San Francisco•1220 Quarry Lane,Pleasanton,CA 84566 <br /> Erna awm r,wRhe Tel 026 404 1918 Fax 925 4841088•www ai 4moom'CA DHS ELAP#2496 Page 10 of 11 <br />