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STLSubmission #: 2003-06-0255 <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: 06/09/2003 13:45 <br /> 7243.011 <br /> Batch QC Report <br /> Prep(s): 3010A Test(s): 6010B <br /> Laboratory Control Spike Water QC Batch #2003/06/09-07.15 <br /> LCS 2003/06/09-07.15-042 Extracted: 06/09/2003 Analyzed: 06/13/200311:29 <br /> LCSD 2003/06/09-07.15-043 Extracted: 06/09/2003 Analyzed: 06/13/200311:32 <br /> Compound Conc. mg/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Calcium 4.97 5.13 5.00 99.4 102.6 3.2 80-120 20 <br /> Magnesium 4.91 5.06 5.00 98.2 101.2 3.0 80-120 20 <br /> Iron 4.80 4.98 5.00 96.0 99.6 3.7 80-120 20 <br /> Manganese 0.488 0.505 0.500 97.6 101.0 3.4 80-120 20 <br /> Sodium 20.0 20.8 20.0 100.0 104.0 3.9 80-120 20 <br /> Potassium 20.6 21.5 20.0 103.0 107.5 4.3 80-120 20 <br /> Severn Trent Laboratories, Inc. 06/24/200310:03 <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 6 <br />