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May 30,2019 <br /> <br />Lab ID : STK1937101 <br />Live Oak Geo Environmental <br /> Customer : 3-16608 <br />Quality Control - Inorganic <br />Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br />Wet Chem <br />Nitrate + Nitrite as N 4500NO3F <br />(VI 1942261-001) <br />MS <br />MSD <br />MSRPD <br />mg/L <br />mg/L <br />mg/L <br />28.18 <br />28.18 <br />28.18 <br />42.1% <br />37.1 % <br />11.1% <br />5-285 <br />5-285 <br /><30.4 <br />4500NO3 F 05/21/19:207525JDD CCB <br />CCV <br />CCB <br />CCV <br />mg/L <br />mg/L <br />mg/L <br />mg/L <br />11.27 <br />11.27 <br />0.156 <br />96.3% <br />0.187 <br />93.0% <br />0.2 <br />90-110 <br />0.2 <br />90-110 <br />Definition <br />CCV : Continuing Calibration Verifica ion - 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 analyte. 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 6 of 6