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May 26, 2021 Lab ID : STK2136533 <br />Live Oak Geo Environmental Customer :3-16608 <br />Quality Control - Inorganic <br />Constituent <br />Method <br />Date/ID <br />I'VPC <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />Wet Chem <br />Nitrate + Nitrite asN <br />450ONO3F <br />05/12121:205253VVH <br />Blank <br />mg/L <br />ND <br /><0.2 <br />LCS <br />mg/L <br />11.22 <br />101% <br />80-120 <br />MS <br />mg/L. <br />5.609 <br />91.8% <br />5-285 <br />(STK2136533-001) <br />MSD <br />mg/L <br />5.609 <br />86.6% <br />5-285 <br />MSRPD <br />m /L <br />5.609 <br />1.2% <br /><30A <br />450ONO3F <br />05/12/21:207053VVH <br />CCB <br />mg/L <br />0.046 <br />0.2 <br />CCV <br />mg/L <br />11.22 <br />98.9% <br />90-110 <br />CCB <br />mg/L <br />0.085 <br />0.2 <br />CCV <br />m /L <br />11.22 <br />993% <br />90-110 <br />urate Nitrogen <br />450ONO3F <br />05/12/21:205253VVH <br />Blank <br />m /L <br />ND <br /><0.2 <br />Definition <br />CCV <br />: Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />CCB <br />: Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />Blank <br />: Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCs <br />: Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. <br />MS <br />: 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 <br />: 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 <br />: MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation <br />and analysis. <br />ND <br />: Non -detect - Result was below the DQO listed for the analyte. <br />DQO <br />: Data Quality Objective - This is the criteria against which the quality control data is compared. <br />Page 8 of 8 <br />