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September 19,2019 Lab ID : STK1953611 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control - Inorganic <br /> Constituent Method Date/lD Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F MS mg/L 28.04 41.0% 5-285 <br /> (CC 1983146-001) MSD mg/L 28.04 40.5% 5-285 <br /> MSRPD m /L 28.04 0.5% Si0.4 <br /> 450ONO3F 09/11/19:214207JDD CCB mg/L 0.174 0.2 <br /> CCV mg/L 11.22 102% 90-110 <br /> CCB mg/L 0.186 0.2 <br /> CCV I m /L 1 11.22 1 100% 1 90-110 <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 /> 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 11 of 11 <br />