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r <br /> STLSubmission 2005-04-0574 ' <br /> Volatile Organic Compounds by 82608 (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 /> Protect 28066866 03000 t Received '0411912005 17 50 <br /> UniFirst Facility-Stockton <br /> Batch QC Report <br /> Prep(s) 5035 Test(s) 8260E <br /> Laboratory Control Spike Soil QC Batch#2005/04124-0170 <br /> LCS ` 2005104124-01 70-013 Extracted 04/24/2005 Analyzed 04/24/2005 09 13 <br /> LCSD " <br /> Compound Conc ug/Kg Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec- ' RPD LCS LCSD <br /> Benzene 112 1000 1120 69-129 20 <br /> Chlorobenzene 110 , 1000 1100 61-121 20 <br /> 1 1-Dichloroethene 993 1000 99 3 65-125 20 <br /> Toluene 111 1000 111 0 70-130 20 <br /> Trichloroethene 112 1000 1120 74-134 20 <br /> Surrogates(s) ' <br /> 4-Bromofluorobenzene 530 500 1060 60-130 <br /> 1,2-Dichloroethane-d4 499 500 99 8 60-140 <br /> Toluene-0 518 500_A1036 I I 70-130 <br /> 1 <br /> 1 <br /> Severn Trent Laboratories, Inc 04/26/20051540 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A part of Severn Trent Pic Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS FLAP#2496 Page 27 of 30 <br />