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February 16, 2017 Lab ID : STK1731191 <br /> Petrelogix Engineering Customer : 3-17915 ' <br /> Quality Control -Inorganic <br /> Constituent Method DatdlD Type Units Cone. QC Data DQO Notc ' <br /> Wet Chem <br /> Nitrate+Nitrite as 450ONO3F MS mg/L 11.22 102% 5285 <br /> (STK1731191-001) MSD mg/L 11.22 105% 5285 ' <br /> MSRPD m 11.22 2.7% <30A <br /> 450ONO3F 01/30/17:201455JDD ICB mg/L 0.013 0.1 <br /> ICV mg/L 11.22 103% 90-110 <br /> CCB mg/L 0.065 0.1 ' <br /> CCV m 11.22 1 103% 90-1!0 <br /> Definition <br /> ICV :Initial Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> ICB :Initial Calibration Blank-Analyzed to verify the instrument baseline is within criteria. ' <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 analyted.The recoveries ' <br /> are an indication of how that sample matrix affects analyte recovery. <br /> MS RPD :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 0!'ective-This is the criteria a ainst which the quality control data is compared. ' <br /> 1 <br /> Page 11 of 1 I ' <br />