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n TL Submission# 2003-10-0435 <br /> Alcohols by GC-FID <br /> TRC Alton Geoscience <br /> Attn Anlu 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 /> Matrix Spike(MS I MSD) Water QC Batch#2003140123-01 20 <br /> MW-5 »MS Lab ID 2003-10-0435-007 <br /> MS 2003110123-01 20-004 Extracted 10/23/2003 Analyzed 10/23/2003 18 03 <br /> Dilution 100 <br /> MSD 2003110123-01 20-005 Extracted 10/2312003 Analyzed 10123120031819 <br /> Dilution 1 00 <br /> Compound Conc mg/L Spk Level Recovery% Limits% Flags <br /> MS MSD Sample mg1L MS MSD RPD Ret RPD MS MSD <br /> Methanol 536 546 ND 500 1072 1092 1 8 60-130 25 <br /> Surrogate(s) <br /> tert-Butyl alcohol 452 446 50 1904 89 2 60-130 0 <br /> Severn Trent Laboratories, Inc 10123/2003 18 19 <br /> STL San Francisco"1220 Quarry Lane Pleasanton CA 94566 <br /> Ao.nafS—T,.,F1, Tel 925 484 1919 Fax 925 484 1096'www stl-inc cam-CA DHS ELAP#2496 Page 11 of 11 <br />