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STL "Submission 2005-05-0333 <br /> CAM 17 Metals • <br /> - --URS_San Francisco, CA_ —-- --_ __ _-- - _ _ <br /> Attn Erik Skov <br /> 221 Main Street 17600 <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 /> ' r <br /> Batch QC Report f <br /> Prep(s) 3010A Test(s) 6010B <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch #2005/05/12-05 15 <br /> MS/MSD + Lab ID 2005-05-0211 -005 <br /> MS 2005/05/12-05 15-023 Extracted 05/12/2005 Analyzed 05/13/2005 10 22 <br /> - a Dilution - 1 00 <br /> MSD 2005/05112-05 15-024 Extracted 05/12/2005 Analyzed 05/13/2005 10 26 <br /> Dilution 1 00 <br /> ' <br /> Compound ' <br /> Conc m !L Spk Leve Recovery% Limits% Flags <br /> MS MSD Sam le m IL MS MSD RPD Rec RPD MS MSD <br /> Antimony 0 512 0 506 ND 0 500 1024 1012 12 75-125 20 <br /> Arsenic 0 513 0 505 ND 0 500 1026 1010 16 75-125 20 <br /> Barium 0 528 _ 0 520_ - ND r_ 0 500 1056- 1040 15 75-125 20 <br /> Beryllium, 0 510 0 502 - ND 0 500 1020 1004 16 75-125 20 <br /> Cadmium 0 515 0 506 ND 0 500 1030 1012 18 75-125 20 <br /> Chromium 0 522 0 515 ND 0 500 1044 1030 `14 75-125 20 <br /> Cobalt 0 518 0 510 ND 0 500 1036 1020 1 6 75-125 20 <br /> Copper 0 523 0 516 ND 0 500 1046 1032 1 3 75-125 20 <br /> Lead 0 518 0 509 ND 0 500 1036 1018 1 8 75-125 20 <br /> Molybdenum 0 529 0 523 ND 0 500 1058 1046 1 1 75-125 20 <br /> Nickel 0 527 0 520 000872 0 500 1037 1023 14 75-125 20 <br /> Selenium 0 510 0 508 NO 0 500 1020 1016 04 75-125 20 <br /> Silver 0 514 0 507 ND 0 500 1028 1014 14 75-125 20 <br /> Thallium 0 520 0 516 ND 0 500 1040 1032 08 75-125 20 <br /> Vanadium 0 524 0 516 ND 0 500 1048 1032 1 5 75-125- 20 <br /> Zinc 0 581 0 569 100606 1 0 500 1041 1017 123 75-125 20 <br /> ' t <br /> • <br /> Severn Trent Laboratories, Inc 05/17/2005 14 04 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton CA 94566 <br /> A prd°(S--Trent Plc Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS FLAP#2496 Page 10 of 11 <br />