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March 10,2021 Lab ID : STK2132649 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID FBIa-nk <br /> Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F 02/24/21:202079VVHmg/L ND <0.2 <br /> mg/L 11.22 103% 80-120 <br /> mg/L 5.609 101% 5-285 <br /> (VI 2141332-002) MSD mg/L 5.609 104% 5-285 <br /> MSRPD m /L 5.609 1.7% Gi0.4 <br /> 450ONO3F 02/24121:202793VVH CCB mg/L 0.139 0.2 <br /> CCV mg/L 11.22 97.1% 90-110 <br /> CCB mg/L 0.132 0.2 <br /> CCV m /L 11.22 97.1% 90-110 <br /> urate Nitrogen I 450ONO3F 02/24121:202079VVH Blank m /L I I 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 /> LCS :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 8 of 8 <br />