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February 8,2019 Lab ID : STK1931481 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control- Inorganic <br /> Constituent Method Date/1D Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F MS mg/L 28.18 40.8% 5-285 <br /> (STK1931481-001) MSD mg/L 28.18 40.2% 5-285 <br /> MSRPD m /L 28.18 0.4% s30A <br /> 450ONO3F 01/31/19:201588JDD ICB mg/L 0.153 0.2 <br /> ICV mg/L 11.27 97.5% 90-110 <br /> CCB mg/L 0.138 0.2 <br /> CCV m /L 11.27 97.4% 90-110 <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 /> j,DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 7 of 7 <br />