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STLSubmission #: 2003-06-0779 <br /> Metals <br /> Geomatrix Consultants <br /> Attn.: Martin Bloes <br /> 2101 Webster St.,12 th Floor <br /> Oakland, CA 94612 <br /> Phone: (510) 663-4148 Fax: (510) 663-4141 <br /> Project: 7243.011 Received: 06/25/2003 15:31 <br /> Batch QC Report <br /> Prep(s): 3010A Test(s): 6010B <br /> Laboratory Control Spike Water QC Batch #2003/06/26-09.15 <br /> LCS 2003/06/26-09.15-101 Extracted: 06/26/2003 Analyzed: 06/30/200312:40 <br /> LCSD 2003/06/26-09.15-102 Extracted: 06/26/2003 Analyzed: 06/30/200312:44 <br /> Compound Conc. mg/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Calcium 5.20 5.12 5.00 104.0 102.4 1.6 80-120 20 <br /> Magnesium 5.11 5.05 5.00 102.2 101.0 1.2 80-120 20 <br /> Iron 5.20 5.12 5.00 104.0 102.4 1.6 80-120 20 <br /> Manganese 0.513 0.504 0.500 102.6 100.8 1.8 80-120 20 <br /> Sodium 21.4 21.1 20.0 107.0 105.5 1.4 80-120 20 <br /> Potassium 20.8 20.5 20.0 104.0 102.5 1.5 80-120 20 <br /> Severn Trent Laboratories, Inc. 07/02/200311:46 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com`CA DHS ELAP#2496 Page 5 of 7 <br />