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STLSubmission# 2004-01-0347 <br /> Gas/BTEX Compounds (High Level) <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 01/14/2004 16 20 <br /> Stockton-Area 16 <br /> Batch QC Re ort <br /> Prep(s) 5030 Test(s) 8021 B <br /> Laboratory Control Spike Soil QC Batch #2004101114-05 01 <br /> LCS 2004101114-05 01-002 Extracted 01/14/2004 Analyzed 01/14/2004 16 57 <br /> LCSD 2004101114-05 01-003 Extracted 01/14/2004 Analyzed 01/14/2004 17 24 <br /> ' Compound Conc mg/Kg Exp Conc Recovery% RPD Ctri Limits% Flags <br /> LCS LCSD LCS LCSD % Recr35 <br /> LCS LCSD <br /> Benzene 0 118 0 117 0 125 944 936 09 77-123 <br /> Toluene 0 123 0 122 0 125 984 976 0 8 78-122 <br /> Ethyl benzene 0 116 0115 0 125 928 92 0 09 70-130 <br /> Xylene(s) 0 355 0 358 0 375 947 955 08 75-125 <br /> Surrogates(s) <br /> Tnfluarotoluene 1508 500 1 500 1016 11000 53-125 0 <br /> i <br /> Severn Trent Laboratories, Inc 01/29/2004 12 09 <br /> STL San Francisco-1220 Quarry Lane Pleasanton CA 94566 <br /> A paR oSevem Trent pk Tel 925 484 1919 Fax 925 484 1 096*www stl-mc corn*CA DHS FLAP#2496 Page 9 of 11 <br /> i <br />