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1 <br /> 1 STL Submission 2005-05-0333 <br /> . Volatile Organic Compounds by 8260B (Low Level) <br /> URS-San Francisco, CA <br /> Attn Erik Skov <br />' 221 Main Street#600 <br /> San Francisco, CA 94105 <br />' Phone (415)896-5858 Fax (415)882-9261 <br /> Project 38066866 04000 Received 05/11/2005 16 41 <br /> Goodwin Procter Unifirst <br /> Batch QC Report <br />' Prep(s) 5030E Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch#2005/05118-01 60 <br />' LCS 2005105118-01 60-050 Extracted 05/18/2005 Analyzed 05/18/2005 09 50 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 179 200 89 5 69-129 20 <br />' Chlorobenzene 198 200 99 0 61-121 20 <br /> 1,1-Dichloroethene 171 200 855 65-125 20 <br /> Toluene 184 200 920 70-130 20 <br /> Trichloroethene 164 200 82 0 74-134 20 <br />' Surrogates(s) <br /> 4-Bromofiuorobenzene 456 500 912 79-118 <br /> 1 2-Dichloroethane-d4 398 500 79 6 78-117 <br />' Toluene-d8 437 1 1500 1874 1 1 177-121 <br /> I <br /> I <br />' Severn Trent Laboratories, Inc 05/19/2005 15 26 <br /> STL San Francisco-1220 quarry Lane Pleasanton,CA 94566 <br /> A ped Of Severn Trsnl PVc Tel 925 484 1919 Fax 925 484 1096`www sti-mc com-CA DHS ELAP#2495 Page 17 of 19 <br />