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Quality Control Results <br /> Client: Chemical Data Management Job Number: 720-18652-1 <br /> Lab Control Spike -Batch: 720-47969 Method: 9040B <br /> Preparation: NIA <br /> Lab Sample ID: LCS 720-47969/1 Analysis Batch: 720-47969 Instrument ID: Coming pH <br /> Client Matrix: Water Prep Batch:N/A Lab File ID: WA <br /> Dilution: 1.0 Units: SU Initial WeighWolume: <br /> Date Analyzed: 03/20/2009 0715 Final Weight/Volume: 50 mL <br /> Date Prepared: N/A <br /> Analyte Spike Amount Result %Rec. Limit Qual <br /> pH 7.00 7.050 101 99- 101 <br /> Duplicate-Batch: 720-47969 Method: 9040B <br /> Preparation: NIA <br /> Lab Sample ID: 720-18652-1 Analysis Batch: 720-47969 Instrument ID: Coming pH <br /> Client Matrix: Water Prep Batch:WA Lab File ID: N/A <br /> Dilution: 1.0 Units: SU initial WeighWolume: <br /> Date Analyzed: 03/20/2009 1436 Final WeighUVolume: 20 mL <br /> Date Prepared: N/A <br /> Analyte Sample Result/Qual Result RPD Limit Qual <br /> pH 10.0 10.00 0 5 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerixa San Francisco Page 14 of 17 <br />