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1 <br />' �� STL Submission 2005-04-0631 <br /> •,� PCBs <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 Received 04/20/2005 16 42 <br /> Urnfirst Facility-Stockton <br /> Batch QC Report <br />' Prep(s) 3550/8082 Test(s) 8082 <br /> Laboratory Control Spike Soil QC Batch #2005104128-01 14 <br /> LCS 2005104128-01 14-002 Extracted 04/28/2005 Analyzed 04/29/2005 19 17 <br /> LCSD 2005104128-01 14-003 Extracted 04/28/2005 Analyzed 04/29/2005 19 36 <br />' Compound Conc ug/Kg Exp Cone Recovery % RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Aroclor 1016 622 639 664 937 962 26 65-135 30 <br /> Aroclor 1260 642 670 664 967 1009 43 65-135 30 <br />'.l <br /> Surrogates(s) <br /> I 2 4 5 6-Tetrachloro-m-xylene 458 461 50 916 922 50-125 0 <br /> Decachlorobiphenyl 477 505 50 954 1009 46-142 0 <br /> 1 <br /> 1 <br />' •� Severn Trent Laboratories, Inc 05/02/2005 15 41 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A pan of Severn 71eni Pk Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS ELAP#2496 Page 5 of 6 <br />