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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 />Date/ID <br />Type <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />Metals <br />Cobalt <br />200.8 <br />09/22/21:214828AC <br />ICB <br />ppb <br />0.057 <br />0.2 <br />CCV <br />ppb <br />120.0 <br />101% <br />90-110 <br />CCB <br />ppb <br />-0.003 <br />0.2 <br />Copper <br />200.8 <br />09/16/21:210733CTC <br />Blank <br />ug/L <br />ND <br /><1 <br />LCs <br />ug/L <br />50.00 <br />105% <br />85-115 <br />II <br />MS <br />ug/L <br />50.00 <br />54.7% <br />75-125 <br />435 II <br />MS <br />ug/L <br />50.00 <br />121% <br />75-125 <br />(CC 2183269-001) <br />MSD <br />ug/L <br />50.00 <br />71.1% <br />75-125 <br />435 <br />MSRPD <br />ug/L <br />50.00 <br />6.4% <br /><_20.0 <br />(CC 2183269-002) <br />MSD <br />ug/L <br />50.00 <br />119% <br />75-125 <br />MSRPD <br />a <br />50.00 <br />1.6% <br /><20.0 <br />200.8 <br />09/22/21:214779AC <br />CCV <br />ppb <br />120.0 <br />105% <br />90-110 <br />CCB <br />ppb <br />-0.592 <br />0.5 <br />220 <br />CCV <br />ppb <br />120.0 <br />98.9% <br />90-110 <br />CCB <br />ppb <br />-0.892 <br />0.5 <br />220 <br />200.8 <br />09/22/21:214828AC <br />ICV <br />ppb <br />120.0 <br />102% <br />90-110 <br />ICB <br />ppb <br />0.065 <br />0.5 <br />CCV <br />ppb <br />120.0 <br />103% <br />90-110 <br />CCB <br />ppb <br />0.163 <br />0.5 <br />Lead <br />200.8 <br />09/16/21:210733CTC <br />Blank <br />ug/L <br />ND <br /><0.5 <br />LCs <br />ug/L <br />50.00 <br />94.9% <br />85-115 <br />MS <br />ug/L <br />50.00 <br />107% <br />75-125 <br />MS <br />ug/L <br />50.00 <br />114% <br />75-125 <br />(CC 2183269-001) <br />MSD <br />ug/L <br />50.00 <br />113% <br />75-125 <br />MSRPD <br />ug/L <br />50.00 <br />5.3% <br /><20.0 <br />(CC 2183269-002) <br />MSD <br />ug/L <br />50.00 <br />116% <br />75-125 <br />MSRPD <br />ug/L <br />50.00 <br />1.7% <br /><20.0 <br />200.8 <br />09/22/21:214779AC <br />CCV <br />ppb <br />120.0 <br />101% <br />90-110 <br />CCB <br />ppb <br />0.004 <br />0.5 <br />CCV <br />ppb <br />120.0 <br />98.2% <br />90-110 <br />CCB <br />ppb <br />-0.003 <br />0.5 <br />200.8 <br />09/22/21:214828AC <br />ICV <br />ppb <br />120.0 <br />101% <br />90-110 <br />ICB <br />ppb <br />0.017 <br />0.5 <br />CCV <br />ppb <br />120.0 <br />102% <br />90-110 <br />CCB <br />ppb <br />0.001 <br />0.5 <br />Molybdenum <br />200.8 <br />09/16/21:210733CTC <br />Blank <br />ug/L <br />ND <br /><1 <br />LCS <br />ug/L <br />50.00 <br />92.0% <br />85-115 <br />MS <br />ug/L <br />50.00 <br />113% <br />75-125 <br />MS <br />ug/L <br />50.00 <br />115% <br />75-125 <br />(CC 2183269-001) <br />MSD <br />ug/L <br />50.00 <br />116% <br />75-125 <br />MSRPD <br />ug/L <br />50.00 <br />2.5% <br /><20 <br />(CC 2183269-002) <br />MSD <br />ug/L <br />50.00 <br />114% <br />75-125 <br />MSRPD <br />ug/L <br />50.00 <br />0.2% <br /><20 <br />200.8 <br />09/22/21:214779AC <br />CCV <br />ppb <br />120.0 <br />98.1 % <br />90-110 <br />CCB <br />ppb <br />0.55 <br />1 <br />CCV <br />ppb <br />120.0 <br />96.3% <br />90-110 <br />CCB <br />ppb <br />0.28 <br />1 <br />200.8 <br />09/22/21:214828AC <br />ICV <br />ppb <br />120.0 <br />102% <br />90-110 <br />ICB <br />ppb <br />0.83 <br />1 <br />CCV <br />ppb <br />120.0 <br />102% <br />90-110 <br />CCB <br />I ppb <br />1 <br />1 0.12 <br />1 1 <br />Nickel <br />200.8 <br />09/16/21:210733CTC <br />Blank <br />ug/L <br />ND <br /><1 <br />LCS <br />I <br />ug/L <br />I <br />50.00 <br />103 % <br />I <br />85-115 <br />1 <br />MS <br />ug/L <br />50.00 <br />111 % <br />75-125 <br />Page 12 of 15 <br />