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STLSubmission# 2004-01-0474 <br /> Volatile Organic Compounds by 8260B (Low Level) <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) 5030B Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch#2004101120-01 07 <br /> LCS 2004/01/20-0107-003 Extracted 01/20/2004 Analyzed 01/20/2004 12 40 <br /> LCSD 2004/01/20-0107-004 Extracted 01/20/2004 Analyzed 01/20/2004 13 05 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> ' Benzene 165 172 200 825 86 0 4 2 69-129 20 <br /> Chlorobenzene 180 182 200 900 91 0 1 1 61-121 20 <br /> 1,1-Dichloroethene 161 171 200 805 855 60 65-125 20 <br /> Toluene 168 173 200 84 0 86 5 2 9 70-130 20 <br /> Trichloroethene 177 178 200 885 89 0 0 6 74-134 20 <br /> surrogates(s) <br /> 4-Bromofluorobenzene 440 457 500 88 0 91 4 86-115 <br /> ' 1,2-Dichloroethane-d4 447 446 500 894 89 2 76-114 <br /> Toluene-d8 444 450 500 1888 1900 88-110 <br /> i <br /> Severn Trent Laboratories, Inc 01/23/2004 16 51 <br /> ' STL San Francisco"1220 Quarry Lane Pleasanton CA 94566 <br /> A pert of S,".Twi Plc Tel 925 484 1919 Fax 925 484 1096"www stHnc com'CA DHS FLAP#2496 Page 18 of 20 <br />