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STLSubmission #: 2003-06-0372 <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: 06/11/2003 15:50 <br /> 7243.011 <br /> Batch QC Report <br /> Prep(s): 3010A Test(s): 6010B <br /> Laboratory Control Spike Water QC Batch #2003/06/13-02.15 <br /> LCS 2003/06/13-02.15-060 Extracted: 06/13/2003 Analyzed: 06/16/200317:36 <br /> LCSD 2003/06/13-02.15-061 Extracted: 06/13/2003 Analyzed: 06/16/200317:40 <br /> Compound Conc. mg/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Calcium 5.07 5.24 5.00 101.4 104.8 3.3 80-120 20 <br /> Magnesium 4.72 4.87 5.00 94.4 97.4 3.1 80-120 20 <br /> Iron 4.96 5.12 5.00 99.2 102.4 3.2 80-120 20 <br /> Manganese 0.521 0.537 0.500 104.2 107.4 3.0 80-120 20 <br /> Sodium 20.6 21.3 20.0 103.0 106.5 3.3 80-120 20 <br /> Potassium 19.3 19.7 20.0 96.5 98.5 2.1 80-120 20 <br /> Severn Trent Laboratories, Inc. 06/24/200312:44 <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 />