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Quality Control Results <br /> Client: H2OGeol Job Number: 720-8838-1 <br /> Method Blank - Batch: 720.20842 Method: 6010B <br /> Preparation: 3050B <br /> Lab Sample ID: MB 720-20842/1-AA Analysis Batch: 720-20857 Instrument ID: Varian ICP <br /> Client Matrix: Solid Prep Batch: 720-20842 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/Kg Initial Weight/Volume: 1 g <br /> Date Analyzed: 04/26/2007 1859 Final WeightlVolume: 50 mL <br /> Date Prepared: 04/25/2007 1517 <br /> Analyte Result Qual RL <br /> Cadmium ND 0.50 <br /> Chromium ND 1.0 <br /> Nickel ND 1.0 <br /> Lead ND 1.0 <br /> Zinc ND 1.0 <br /> Lab Control Spike/ Method: 60108 <br /> Lab Control Spike Duplicate Recovery Report - Batch: 720-20842 Preparation: 30508 <br /> LCS Lab Sample ID:LCS 720-20842/2-AA Analysis Batch: 720-20857 Instrument ID: Varian ICP <br /> Client Matrix: Solid Prep Batch: 720-20842 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/Kg Initial Weight/Volume: 1 g <br /> Date Analyzed: 04/26/2007 1902 Final WeighWolume: 50 mL <br /> Date Prepared: 04/25/2007 1517 <br /> LCSD Lab Sample ID:LCSD 720-20842/3-AA Analysis Batch: 720-20857 Instrument ID: Varian ICP <br /> Client Matrix: Solid Prep Batch: 720-20842 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/Kg Initial WeighWolume: 1 g <br /> Dale Analyzed: 04/26/2007 1906 Final WeighWolume: 50 mL <br /> Date Prepared: 04/25/2007 1517 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Cadmium 100 101 80- 120 1 20 <br /> Chromium 99 101 80- 120 1 20 <br /> Nickel 101 102 80- 120 1 20 <br /> Lead 98 99 80- 120 1 20 <br /> Zinc 99 101 80- 120 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 59 of 84 <br />