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Quality Control Results <br /> Client: Earth Tech, Inc. Job Number: 720-14778-1 <br /> Matrix Spike/ Method: 7470A <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-36889 Preparation: 7470A <br /> Dissolved <br /> MS Lab Sample ID: 720-14708-H-19-B MS 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 Initial Weight/Volume: 25 mL <br /> 1 Date Analyzed: 06/18/2008 1102 Final Weight/Volume: 50 mL <br /> Date Prepared: 06/18/2008 0723 <br /> --- __. _._ -------- <br /> MSD <br /> -- ----._.... <br /> MSD Lab Sample ID: 720-14708-H-19-C MSD 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 Initial Weight/Volume: 25 mL <br /> Date Analyzed: 06/18/2008 1104 Final Weight/Volume: 50 mL <br /> Date Prepared: 06/18/2008 0723 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qua[ MSD Qual <br /> Mercury 129 130 75- 125 1 20 F F <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 48 of 51 <br />