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■®© <br /> STL Submission: 2005=04-0633 <br /> Metals <br /> Treadwell& Rollo-San Francisco <br /> Attn.:David Dixon <br /> 555 Montgomery Street. Suite 1300 <br /> San Francisco, CA 94111-2554 <br /> Phone: (415)955-9040 Fax: (415)955-9041 <br /> Project: 2597.10 Received:04/20/2005 14:00 <br /> Carando <br /> Batch-QC Report <br /> Prep(s): 3010A Test(s): 6010B <br /> Laboratory Control Spike Water QC Batch#2005/04/27-01.15 <br /> LCS2005/0 /4 27-01.15-051 Extracted: 04/27/2005 Analyzed: 04/27/2005 12:37 <br /> LCSD 2005/04/27--01.15-052 Extracted: 04/27/2005 Analyzed: 04/27/200512:40 <br /> Compound Cone. mg/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS : LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Cadmium 0.500 0.491 0.500 100.0 98.2 1.8 80-120 20 <br /> Chromium 0.509 0.499 0.500 101.8 99.8 2.0 80-120 20 <br /> Copper 0.512 0.503 0.500 102.4 100.6 1.8 80-120 20 <br /> Lead 0.503 . 0.495 0.500 100.6 99.0 1.6 80-120 20 <br /> Nickel 0.508 0.499 0.500 101.6 99.8 1.8 80-120 20 <br /> Zinc 0.500 0.491 0.500 100.0 98.2 1.8 80-120 20 <br /> Severn Trent Laboratories, Inc. 04/28/200513:25 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apart of Sevem Trent Pic Tel 925 484 1919 Fax 925 484 1096*www.sti-inc.com*CA DHS ELAP#2496 Page 4 of 4 <br />