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Submission# 2003-10-0435 <br /> STL Alcohols by GC-FID <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 48 <br /> 01205 <br /> Site 16470 Cambridge St Lathrop CA <br /> Batch QC Report <br /> Prep(s) 8015M Alcohols Test(s) 8015Mod <br /> Laboratory Control Spike Water QC Batch#2003110123-01 20 <br /> LCS 2003110123-01 20-002 Extracted 10/23/2003 Analyzed 10/23/2003 16 01 <br /> LCSD 2003110123-01 20-003 Extracted 1012312003 Analyzed 10/23/2003 16 26 <br /> Compound Conc mg/L Exp Cone Recovery% RPD Ctri Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methanol 54 5 49 3 500 1090 98 6 100 60-130 25 <br /> Surrogates(s) <br /> tert-Butyl alcohol 47 2 526 50 944 1052 60-130 0 <br /> I <br /> Severn Trent Laboratories, Inc 10/2312003 18 19 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> APv 106""T, pqc Tel 925 484 1919 Fax 925 484 1096•www stl-enc corn'CA QHS FLAP*2496 Page 10 of 11 <br />