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1 <br /> 1 STL Submission 2005-05-0333 ' <br /> PCBs <br />' URS-San Francisco, CA <br /> i <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 /> I <br /> Batch QC Report <br />' Prep(s) 3510/8082 Test(s) 8082 <br /> Laboratory Control Spike Water QC Batch #2005/05/13-0114 <br />' LCS 2005105113-01 14-002 Extracted 05/13/2005 Analyzed 05/16/2005 15 48 <br /> LCSD 2005105113-01 14-003 Extracted 05/13/2005 Analyzed 05/16/2005 16 08 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Aroclor 1016 207 1 98 200 1035 990 44 65-135 30 <br />' Aroclor 1260 202 199 200 101 0 995 15 65-135 30 <br /> Surrogates(s) <br /> 2,4,5,6-Tetrachloro-m-xylene 488 478 50 977 955 68-132 0 <br /> Decachlorobiphenyl 471 467 50 943 934 60-140 0 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br />' Severn Trent Laboratories, Inc 05/17/2005 14 01 <br /> STL San Francisca`1220 Quarry Lane Pleasanton CA 94566 <br /> 11 caq 11 S6-,1-1 Plc Tel 125 484 1911 Fax 125 484 1096'www stl-inc cam'CA DHS ELAP#2496 Page 7 of 7 <br />