On or after October 1, 2021, Class B fire–fighting foam that contains intentionally added PFAS chemicals may not be used for:
(1) Testing purposes, including calibration testing, conformance testing, and fixed–system testing unless:
(i) The use is required by law or by the agency having jurisdiction over the testing facility; and
(ii) The testing facility has implemented appropriate containment, treatment, and disposal measures to prevent releases of foam into the environment; or
(2) Training purposes.