Prohibition and exemptions

Prohibition and exemptions. (1) Except as provided under sub. (2) , no person may use or otherwise discharge, including for training purposes, a class B firefighting foam that contains intentionally added PFAS. (2) All of the following actions are exempt from the prohibition under sub. (1) : (a) The use or discharge by any person of a class B firefighting foam that contains intentionally added PFAS as part of an emergency firefighting or fire prevention operation. (b) The use by any person of class B firefighting foam that contains intentionally added PFAS for testing purposes, including calibration testing, conformance testing, or fixed system testing, if the testing facility has implemented appropriate containment, treatment, and disposal or storage measures, as specified in ss. NR 159.06 to 159.08 , to prevent discharges of the foam to the environment.