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STL <br /> GasIBTEX by 8015M18021 Submission # 2004-01-0542 <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 2597 10 Received 01/20/2004 17 25 <br /> Stockton-Area 16 <br /> Batch QC Report <br /> Prep(s) 5035 Test(s) 8021B <br /> Laboratory Control Spike Soil QC Batch#2004101/22-01 01 <br /> LCS 2004101122-01 01-002 Extracted 01/22/2004 Analyzed 01/22/2004 07 21 <br /> LCSD 2004101122-01 01-003 Extracted 01122/2004 Analyzed 01/22/20040747 <br /> Compound Conc mg/Kg Exp Conc Recovery% RPD Ctrl Limits% Flags , <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 00898 00792 01000 898 79 2 125 77-123 35 <br /> Toluene 00984 00856 01000 984 856 139 78-122 35 <br /> Ethyl benzene 00943 00516 01000 943 81 6 144 70-130 35 <br /> Xylene(s) 0 287 0 248 0 300 957 827 146 75-125 35 <br /> Surrogates(s) <br /> Trifluorotoluene 408 388 500 1816 1776 53-125 <br /> Severn Trent Laboratories, Inc 01/29/2004 12 35 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton CA 94566 <br /> A part of Se enn Trani Pk Tel 925 484 1919 Fax 925 484 1 096"www stl-inc com"CA DH5 ELAP*2496 Page 7 of 9 <br />