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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-9514-1 <br /> LCS-Standard Reference Material - Batch: 720-22773 Method: 6010B <br /> Preparation: 3050B <br /> Lab Sample ID: LCSSRM 720-22773/4-AA Analysis Batch: 720-22822 Instrument ID: Varian ICP <br /> Client Matrix: Solid Prep Batch: 720-22773 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/Kg Initial Weight/Volume: 1.01 g <br /> Date Analyzed: 06/19/2007 1224 Final Weight/Volume: 50 mL <br /> Date Prepared: 06/18/2007 1140 <br /> Analyte Spike Amount Result % Rec. Limit Qual <br /> Antimony 27.4 7.04 26 14-96 <br /> Arsenic 22.7 20.7 91 72- 128 <br /> Barium 145 129 89 80- 120 <br /> Beryllium 1.09 0.995 91 65- 134 <br /> Cadmium 42.2 38.3 91 80- 120 <br /> Chromium 246 222 90 80- 120 <br /> Cobalt 65.1 63.7 98 72- 128 <br /> Copper 58.5 55.2 94 80- 120 <br /> Lead 44.1 38.4 87 75- 126 <br /> Molybdenum 61.0 54.3 89 62- 138 <br /> Nickel 96.8 87.1 90 80- 120 <br /> Selenium 165 152 92 80- 120 <br /> Silver 79.5 70.6 89 72- 127 <br /> Thallium 55.9 51.4 92 79- 121 <br /> Vanadium 56.7 53.2 94 63- 137 <br /> Zinc 44.0 36.4 83 75- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 208 of 222 06/25/2007 <br />