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STLSubmission# 2004-01-0347 <br /> Gas/BTEX by 8015M18021 <br /> Treadwell& Rolla-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 /> Protect 2597 10 Received 01/14/2004 16 20 <br /> Stockton-Area 16 <br /> Batch QC Report <br /> Prep(s) 5035 Test(s) 8021B <br /> Laboratory Control Spike Soil QC Batch#2004101114-01 01 <br /> LCS 2004101114-01 01-004 Extracted 01114/2004 Analyzed 01/14/2004 10 04 <br /> LCSD 2004101114-01 01-005 Extracted 01/14/2004 Analyzed 01/14/2004 10 30 <br /> Compound Conc mg/Kg Exp Conc L Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS 1 LCSD % Rec RPD LCS LCSD <br /> Benzene 0 100 0 102 01000 1000 1020 2 0 77-123 35 <br /> Toluene 0 108 0 108 01000 1080 1080 00 78-122 35 <br /> Ethyl benzene 00995 0 102 01000 995 1020 25 70-130 35 <br /> Xylene(s) 0 299 0 299 0 300 997 997 00 75-125 35 <br /> Surrogates(s) <br /> Trifluorotoluene 546 1559 500 1092 Jill 8 53-125 <br /> Severn Trent Laboratories, Inc 01/29/2004 15 58 <br /> STL San Francisca•1220 Quarry Lane Pleasanton,CA 94566 <br /> A P01 of SMM T...a P!c Tel 925 484 1919 Fax 925 4841096`www stl-inc corn.CA DNS ELAP#2496 Page 4 of 5 <br />