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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-29703-1 <br /> Method Blank-Batch: 500-91592 Method: SM 4500 NH3 C <br /> Preparation: SM 4500 NH3 B <br /> Lab Sample ID: MB 500-91592/1-A Analysis Batch: 500-91647 Instrument ID: SPEC5 <br /> Client Matrix: Water Prep Batch: 500-91592 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial Weight/Volume: 100 mL <br /> Date Analyzed: 08/12/2010 1230 Final Weight/Volume: 100 mL <br /> Date Prepared: 08/12/2010 0720 <br /> Analyte Result Qual RL <br /> Ammonia ND 0.20 <br /> Lab Control Sample-Batch: 500-91592 Method: SM 4500 NH3 C <br /> Preparation: SM 4500 NH3 B <br /> Lab Sample ID: LCS 500-91592/2-A Analysis Batch: 500-91647 Instrument ID: SPEC5 <br /> Client Matrix: Water Prep Batch: 500-91592 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial Weight/Volume: 100 mL <br /> Date Analyzed: 08/12/2010 1230 Final Weight/Volume: 100 mL <br /> Date Prepared: 08/12/2010 0720 <br /> Analyte Spike Amount Result % Rec. Limit Qual <br /> Ammonia 2.50 2.31 92 80-120 <br /> Matrix Spike/ Method: SM 4500 NH3 C <br /> Matrix Spike Duplicate Recovery Report-Batch: 500-91592 Preparation: SM 4500 NH3 B <br /> MS Lab Sample ID: 720-29703-1 Analysis Batch: 500-91647 Instrument ID: SPEC5 <br /> Client Matrix: Water Prep Batch: 500-91592 Lab File ID: N/A <br /> Dilution: 1.0 Initial Weight/Volume: 100 mL <br /> Date Analyzed: 08/12/2010 1231 Final Weight/Volume: 100 mL <br /> Date Prepared: 08/12/2010 0720 <br /> MSD Lab Sample ID: 720-29703-1 Analysis Batch: 500-91647 Instrument ID: SPEC5 <br /> Client Matrix: Water Prep Batch: 500-91592 Lab File ID: N/A <br /> Dilution: 1.0 Initial Weight/Volume: 100 mL <br /> Date Analyzed: 08/12/2010 1231 Final Weight/Volume: 100 mL <br /> Date Prepared: 08/12/2010 0720 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Ammonia 88 87 75-125 1 20 <br /> TestAmerica San Francisco Page 67 of 73 <br />