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STLSubmission #: 2003-06-0483 <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: 06/16/2003 12:50 <br /> Batch QC Report <br /> Prep(s): 3010A Test(s): 6010B <br /> Laboratory Control Spike Water QC Batch #2003/06/16-08.15 <br /> LCS 2003/06/16-08.15-014 Extracted: 06/16/2003 Analyzed: 06/24/2003 08:13 <br /> LCSD 2003/06/16-08.15-015 Extracted: 06/16/2003 Analyzed: 06/24/2003 08:16 <br /> Compound Conc. mg/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Calcium 5.19 5.11 5.00 103.8 102.2 1.6 80-120 20 <br /> Magnesium 5.20 5.12 5.00 104.0 102.4 1.6 80-120 20 <br /> Iron 5.05 4.99 5.00 101.0 99.8 1.2 80-120 20 <br /> Manganese 0.522 0.515 0.500 104.4 103.0 1.4 80-120 20 <br /> Sodium 20.1 19.7 20.0 100.5 98.5 2.0 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. 06/24/200314:31 <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 />