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STLSubmission #: 2003-06-0013 <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: 06/02/2003 08:42 <br /> Batch QC Report <br /> Prep(s): 3010A Test(s): 6010B <br /> Laboratory Control Spike Water QC Batch #2003/06/03-02.15 <br /> LCS 2003/06/03-02.15-093 Extracted: 06/03/2003 Analyzed: 06/04/2003 20:48 <br /> LCSD 2003/06/03-02.15-094 Extracted: 06/03/2003 Analyzed: 06/04/2003 20:51 <br /> Compound Conc. mg/L Exp.Conc. Recovery RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Copper 0.481 0.501 0.500 96.2 100.2 4.1 80-120 20 <br /> Zinc 0.503 0.524 0.500 100.6 104.8 4.1 80-120 20 <br /> Calcium 4.59 4.87 5.00 91.8 97.4 5.9 80-120 20 <br /> Magnesium 4.68 4.98 5.00 93.6 99.6 6.2 80-120 20 <br /> Iron 5.59 6.00 5.00 111.8 120.0 7.1 80-120 20 <br /> Sodium 19.8 20.7 20.0 99.0 103.5 4.4 80-120 20 <br /> Potassium 19.8 20.7 20.0 99.0 103.5 4.4 80-120 20 <br /> Severn Trent Laboratories, Inc. 06/10/2003 07:37 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Severn Trent Pic Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com`CA DHS ELAP#2496 Page 5 of 7 <br />