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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-9415-1 <br /> LCS-Standard Reference Material - Batch: 720-22443 Method: 6010B <br /> Preparation: 3050B <br /> Lab Sample ID: LCSSRM 720-22443/4-AA Analysis Batch: 720-22497 Instrument ID: Varian ICP <br /> Client Matrix: Solid Prep Batch: 720-22443 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/Kg Initial Weight/Volume: 1.02 g <br /> Date Analyzed: 06/08/2007 1108 Final Weight/Volume: 50 mL <br /> Date Prepared: 06/07/2007 1333 <br /> Analyte Spike Amount Result % Rec. Limit Qual <br /> Antimony 27.4 11.9 43 14-96 <br /> Arsenic 22.7 20.3 89 72- 128 <br /> Barium 145 130 89 80- 120 <br /> Beryllium 1.09 0.951 87 65- 134 <br /> Cadmium 42.2 38.1 90 80- 120 <br /> Chromium 246 227 92 80- 120 <br /> Cobalt 65.1 65.1 100 72- 128 <br /> Copper 58.5 54.3 93 80- 120 <br /> Lead 44.1 38.7 88 75- 126 <br /> Molybdenum 61.0 56.7 93 62- 138 <br /> Nickel 96.8 87.3 90 80- 120 <br /> Selenium 165 150 91 80- 120 <br /> Silver 79.5 67.4 85 72- 127 <br /> Thallium 55.9 50.2 90 79- 121 <br /> Vanadium 56.7 54.5 96 63- 137 <br /> Zinc 44.0 36.0 82 75- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 57 of 64 06/14/2007 <br />