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Submission# 2003-10-0434 <br /> • Gas/BTEX Fuel Oxygenates b 82608 <br /> Y9 Y <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 410500-01 Received 10/10/2003 15 37 <br /> 01205 <br /> Site 16470 Cambridge St, Lathrop CA <br /> Batch QC Report <br /> Prep(s) 5030B _ Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2003110123-01 68 <br /> LCS 2003110123-01 68-027 Extracted 10/23/2003 Analyzed 101231200311 27 <br /> LCSD 2003110123-01 68-047 Extracted 10/23/2003 Analyzed 101231200311 47 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LOS I LCSD <br /> Benzene 22 5 224 25 0 900 896 04 69-129 20 <br /> Toluene 234 235 25 0 93 6 940 04 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 228 218 250 91 2 872 45 65-165 20 <br /> Surrogates(s) <br /> 1 2-Dichioroethane-d4 505 496 500 101 0 99 2 76-114 <br /> Toluene-d8 515 532 500 103 0 11064 1 88-110 <br /> Severn Trent Laboratories, Inc 10/24/2003 14 01 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> Tel 925 484 1919 Fax 925 484 1096'www stl-mc com'CA DHS ELAP#2496 Page 12 of 13 <br />