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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-10502-1 <br /> Method Blank- Batch: 720-25456 Method: SM 2320B <br /> Preparation: N/A <br /> Lab Sample ID: MB 720-25456/1 Analysis Batch: 720-25456 Instrument ID: Corning pH <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial Weight/Volume: <br /> Date Analyzed: 08/29/2007 1200 Final Weight/Volume: mL <br /> Date Prepared: N/A <br /> Analyte Result Qual RL <br /> Alkalinity ND 8.0 <br /> Lab Control Spike/ Method: SM 2320B <br /> Lab Control Spike Duplicate Recovery Report- Batch: 720-25456 Preparation: N/A <br /> LCS Lab Sample ID:LCS 720-25456/2 Analysis Batch: 720-25456 Instrument ID: Corning pH <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial Weight/Volume: <br /> Date Analyzed: 08/29/2007 1200 Final Weight/Volume: mL <br /> Date Prepared: N/A <br /> LCSD Lab Sample ID:LCSD 720-25456/3 Analysis Batch: 720-25456 Instrument ID: Corning pH <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial Weight/Volume: <br /> Date Analyzed: 08/29/2007 1200 Final Weight/Volume: mL <br /> Date Prepared: N/A <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Alkalinity 94 94 80- 120 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 41 of 44 09/04/2007 <br />