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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-10502-1 <br /> Matrix Spike/ Method: 6010B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-25451 Preparation: 3010A <br /> MS Lab Sample ID: 720-10505-A-13-AMS Analysis Batch: 720-25532 Instrument ID: Varian ICP <br /> Client Matrix: Water Prep Batch: 720-25451 Lab File ID: N/A <br /> Dilution: 1.0 Initial Weight/Volume: 50 mL <br /> Date Analyzed: 08/30/2007 1433 Final Weight/Volume: 50 mL <br /> Date Prepared: 08/29/2007 1405 <br /> MSD Lab Sample ID: 720-10505-A-13-B MSD Analysis Batch: 720-25532 Instrument ID: Varian ICP <br /> Client Matrix: Water Prep Batch: 720-25451 Lab File ID: N/A <br /> Dilution: 1.0 Initial Weight/Volume: 50 mL <br /> Date Analyzed: 08/30/2007 1437 Final Weight/Volume: 50 mL <br /> Date Prepared: 08/29/2007 1405 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Calcium 24 28 75- 125 0 25 4 4 <br /> Copper 104 107 75- 125 3 25 <br /> Iron 84 86 75- 125 2 25 <br /> Potassium 114 124 75- 125 5 25 <br /> Potassium 114 130 75- 125 2 25 F <br /> Potassium 127 124 75- 125 5 25 F <br /> Potassium 127 130 75- 125 2 25 F F <br /> Magnesium 174 422 75- 125 3 25 4 4 <br /> Manganese 116 182 75- 125 3 25 4 4 <br /> Sodium 129 232 75- 125 3 25 4 4 <br /> Zinc 85 88 75- 125 3 25 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 31 of 44 09/04/2007 <br />