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January 31, 2019 Lab ID : STK1930913 <br /> Matt Shinn Customer : 3-16964 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID 7'Ipc ('nits ('onc. (Z( (Alta DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F MS mg/L 28.18 38.2% 5-285 <br /> (VI 1940241-001) MSD mg/L 28.18 38.2% 5-285 <br /> MSRPD I m 28.18 0.05% 1 _530.4 <br /> 1500NO3F O1/18/19:200872JDD ICB mg/L 0.196 0.2 <br /> ICV mg/L 11.27 97.3% 90-110 <br /> CCB mg/L 0.193 0.2 <br /> CCV m 11.27 99.9% 90-11() <br /> Definition <br /> ICV :Initial Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> ICB :Initial Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> CCB :Continuing Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample <br /> matrix affects analyte recovery. <br /> MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries <br /> are an indication of how that sample matrix affects analyte recovery. <br /> MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared.- <br /> Page <br /> om ared. Page 8 of 8 <br />