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September 24, 2021 Metal Finishing Solutions, Inc. Lab ID : STK2152815 Customer :3-18181 Quality Control: All samples were prepared and analyzed according to the following tables: Inorganic - Metals QC 200.8 09/22/2021:214779 All analysis quality controls are within established criteria. 300.0 09/22/2021:214828 All analysis quality controls are within established criteria. 09/23/2021:214869 All analysis quality controls are within established criteria. concentration or ND relative to the PQL. 09/23/2021:214932 All analysis quality controls are within established criteria. 09/16/2021:210733 All preparation quality controls are within established criteria (performed at FGL-SP ELAN 1573), except: The following note applies to Chromium, Copper, Selenium, Zinc, Barium, Vanadium: 09/23/2021:211037 All preparation quality controls are within established criteria (performed at FGL-SP 435 Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. 245.1 09/20/2021:214647 All analysis quality controls are within established criteria. 09/20/2021:210866 All preparation quality controls are within established criteria (performed at FGL-SP ELAN 1573). Inorganic - Wet Chemistry QC Certification:: I certify that this data package is in compliance with ELAP standards, both technically and for completeness, except for any conditions listed above. Release of the data contained in this data package is authorized by the Laboratory Director or his designee, as verified by the following electronic signature. KD:MKH Digitally signed by Kelly A. D—h.., B.S. Approved By Kelly A. Dunnahoo, B.S. Title. LabmwryD—tnr Date 2021-09-24 Page 2 of 15 09/20/2021:214717 All analysis quality controls are within established criteria, except: 300.0 The following note applies to Fluoride: 220 The CCB was greater than the DQO. However, all results were either five times greater than the CCB concentration or ND relative to the PQL. 09/23/2021:214932 All analysis quality controls are within established criteria. 09/20/2021:210906 All preparation quality controls are within established criteria (performed at FGL-SP ELAN 1573). 09/23/2021:211037 All preparation quality controls are within established criteria (performed at FGL-SP ELAP# 1573). Certification:: I certify that this data package is in compliance with ELAP standards, both technically and for completeness, except for any conditions listed above. Release of the data contained in this data package is authorized by the Laboratory Director or his designee, as verified by the following electronic signature. KD:MKH Digitally signed by Kelly A. D—h.., B.S. Approved By Kelly A. Dunnahoo, B.S. Title. LabmwryD—tnr Date 2021-09-24 Page 2 of 15