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� STL <br /> GasIBTEX by 8015M18021 Submission# 2004-01-0672 <br /> Treadwell & Rollo San Francisco <br /> Attn Brian Moore <br /> ' 555 Montgomery Street, Suite 1300 <br /> San Francisco, CA 94111-2554 <br /> ' Phone (415) 955-9040 Fax (415) 955-9041 <br /> Project 259710 Received 01/14/2004 <br /> Stockton-Area 16 <br /> Batch QC Report <br /> ' Prep(s) 5035 Test(s) 8021 B <br /> Laboratory Control Spike Soil QC Batch#2004101127-01 01 <br /> ' LCS 2004101127-01 01-004 Extracted 01/27/2004 Analyzed 01/27/2004 07 30 <br /> LCSD 2004101127-01 01-005 Extracted 01/27/2004 Analyzed 01/27/2004 07 56 <br /> ' Compound Conc mg/Kg Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 00960 00979 01000 96 0 97 9 2 0 77-123 35 <br /> Toluene 00998 0 102 01000 99 8 1020 2 2 78-122 35 <br /> Ethyl benzene 00934 00950 01000 934 950 1 7 70-130 35 <br /> Xylene(s) 0 279 0 286 0 300 930 953 2 4 75-125 35 <br /> Surrogates(s) <br /> ' Trifluorotoluene 407 420 500 814 84 0 53-125 <br /> Severn Trent Laboratories, Inc 01/29/2004 12 38 <br /> STL San Francisca*1220 Quarry Lane,Pleasanton CA 94565 <br /> A part of Sr mTrevi Pt Tel 925 484 1919 Fax 925 484 1096-www sil-inc corn'CA DHS ELAP#2495 Page 7 of 11 <br /> 1 <br />