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STLSubmission# 2004-01-0474 <br /> Gas/BTEX by 8015MI8021 <br /> Treadwell & Rollo-San Francisco <br /> Attn David Dixon <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 01/16/2004 16 50 ' <br /> Stockton - Carando Site <br /> Batch QC Report <br /> Prep(s) 5035 Test(s) 8021 B <br /> Laboratory Control Spike Sod QC Batch#2004/01119-0101 , <br /> LCS 2004101/19-01 01-004 Extracted 01/19/2004 Analyzed 01/19/2004 07 17 ' <br /> LCSD 2004/01/19-0101-005 Extracted 01/19/2004 Analyzed 01/19/2004 07 43 <br /> Compound Conc mg/Kg Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec I RPD LCS LCSD ' <br /> Benzene 00899 00878 01000 899 878 24 77-123 35 <br /> Toluene 00968 00951 01000 968 951 1 8 78-122 35 <br /> Ethyl benzene 00904 00884 0 1000 904 88 4 2 2 70-130 35 <br /> Xylene(s) 0 279 0 273 0 300 930 91 0 22 75-125 35 <br /> Surrogates(s) <br /> Trifluorotoluene 431 1416 1500 86 2 832 53-125 <br /> 1 <br /> Severn Trent Laboratories, Inc 01/2912004 12 34 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A pert of S-rrem Pic Tel 925 484 1919 Fax 926 484 1096'www stl-inc corn'CA DHS ELAP#2496 Page 17 of 28 <br />