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June 30,2020 Lab ID : STK2038788 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F 06/23/20:207212VVH Blank mg/L ND <0.2 <br /> LES mg/L 11.22 96.9% 80-120 <br /> MS mg/L 5.609 943% 5-285 <br /> (STK2038788-001) MSD mg/L 5.609 96.2% 5-285 <br /> MSRPD mg/L 5.609 1.0% <30.4 <br /> 450ONO3F 06/23/20:209896VVH CCB mg/L 0.151 0.2 <br /> CCV mg/L 11.22 96.8% 90-110 <br /> CCB mg/L 0.197 0.2 <br /> CCV m 1 11.22 1 97.1% 1 90-110 <br /> itrate Nitrogen 1 450ONO3F 06/23/20:207212VVH Blank mg/L I I ND 1 <0.2 <br /> Definition <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 /> Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. <br /> LES :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. <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 /> ND :Non-detect-Result was below the DQO listed for the analyte. <br /> U O :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 7 of 7 <br />