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September 24, 2021 Lab ID : STK2152815 <br />Metal Finishing Solutions, Inc. Customer :3-18181 <br />Quality Control - Inorganic <br />Constituent <br />Method <br />DateAD <br />Type <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />Wet Chem <br />Fluoride <br />300.0 <br />(STK2150623-014) <br />MSD <br />mg/L <br />5.000 <br />104% <br />87-120 <br />MSRPD <br />mg/L <br />50.00 <br />0.06% <br /><16 <br />Ms <br />mg/L <br />5.000 <br />103% <br />87-120 <br />(STK2150623-003) <br />MSD <br />mg/L <br />5.000 <br />102% <br />87-120 <br />MSRPD <br />m <br />50.00 <br />0.5% <br /><16 <br />300.0 <br />09/20/21:214717njb <br />ICB <br />mg/l <br />0.00 <br />0.1 <br />ICV <br />mg/l <br />2.500 <br />100% <br />90-110 <br />CCB <br />mg/1 <br />0.00 <br />0.1 <br />CCV <br />mg/1 <br />2.500 <br />101% <br />90-110 <br />CCB <br />mg/1 <br />1.12 <br />0.1 <br />220 <br />CCV <br />mg/l <br />2.500 <br />102% <br />90-110 <br />CCB <br />mg/l <br />0.0200 <br />0.1 <br />CCV <br />mg/1 <br />2.500 <br />101% <br />90-110 <br />CCB <br />mg/l <br />0.0100 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />102% <br />90-110 <br />300.0 <br />09/23/21:211037MCA <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />102% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />102% <br />87-120 <br />(CC 2183327-001) <br />MSD <br />mg/L <br />5.000 <br />101% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />0.5% <br /><16 <br />MS <br />mg/L <br />5.000 <br />99.4% <br />87-120 <br />(CH 2177502-001) <br />MSD <br />mg/L <br />5.000 <br />100% <br />87-120 <br />MSRPD <br />m <br />10.00 <br />0.7% <br /><16 <br />300.0 <br />09/23/21:214932njb <br />ICB <br />mg/1 <br />0.00 <br />0.1 <br />ICV <br />mg/l <br />2.500 <br />98.6% <br />90-110 <br />CCB <br />mg/1 <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />99.7% <br />90-110 <br />Definition <br />ICV : Initial Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />1CB : 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 />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 />Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample <br />MS <br />matrix affects analyte recovery. <br />: Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyte. The recoveries <br />MSD <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 />Explanation <br />: The CCB was greater than the DQO. However, all results were either five times greater than the CCB concentration or ND relative <br />220 <br />to the PQL. <br />435 : Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <br />Page 15 of 15 <br />