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1 <br /> 1 <br /> Quality Control Results <br /> Client: Earth Tech, Inc. Job Number: 720-14778-1 <br /> Method Blank- Batch: 720-36889 Method: 7470A <br /> Preparation: 7470A <br /> Lab Sample ID: MB 720-36889/1-A Analysis Batch: 720-36917 Instrument ID: FIMS 100 <br /> Client Matrix: Water Prep Batch: 720-36889 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial WeighWolume: 25 mL <br /> Date Analyzed: 06/18/2008 1059 Final Weight/Volume: 50 mL <br /> Date Prepared: 06/18/2008 0723 <br /> Analyte Result �Qual RL <br /> Mercury ND 0.00020 <br /> 1 Lab Control Spike/ Method: 7470A <br /> Lab Control Spike Duplicate Recovery Report-Batch: 720-36889 Preparation: 7470A <br /> LCS Lab Sample ID: LCS 720-36889/2-A Analysis Batch: 720-36917 Instrument ID: FIMS 100 <br /> Client Matrix: Water Prep Batch: 720-36889 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial Weight/Volume: 25 mL <br /> 1 Date Analyzed: 06/18/2008 1100 Final Weight/Volume: 50 mL <br /> Date Prepared: 06/18/2008 0723 <br /> LCSD Lab Sample ID:LCSD 720-36889/3-A Analysis Batch: 720-36917 Instrument ID: FIMS 100 <br /> Client Matrix: Water Prep Batch: 720-36889 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial Weight/Volume: 25 mL <br /> Date Analyzed: 06/18/2008 1101 Final Weight/Volume: 50 mL <br /> Date Prepared: 06/18/2008 0723 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Mercury 88 89 80-120 0 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 47 of 51 <br />