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December 29,2020 Lab ID : STK2057525 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control - Inorganic <br /> Constituent Method Date/1D Type Units Cone. QC Data DQ0 Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F 12/22/20:215021VVH Blank mg/L ND <0.2 <br /> L.CS mg/L 11.22 99.8% 80-120 <br /> MS mg/L 5.609 99A% 5-285 <br /> (V 12049913-004) MSD mg/L 5.609 100% 5-285 <br /> MSRPD m /L 5.609 0.6% 630A <br /> 450ONO3F 12/22/20:220394VVH CCB mg/L 0.104 0.2 <br /> CCV mg/L 11.22 102% 90-110 <br /> CCB mg/L 0.114 0.2 <br /> CCV m /L 11.22 99.4% 90-110 <br /> itrate Nitrogen 450ONO3F 12/22/20:215021VVH Blank ML/L- ND <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 /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 7 of 7 <br />