Wisconsin Statutes Environmental Regulation (Ch. 280 to 299) § 299.48. Fire fighting foam containing PFAS

(a) “Class B fire fighting foam” means a foam designed for use on a flammable liquid fire, and may include a dual action Class A and B foam.

(b) “PFAS” means a perfluoroalkyl or polyfluoroalkyl substance.

(c) “Testing” includes testing of a fire fighting foam to evaluate its effectiveness and testing of a fire fighting foam delivery system or equipment.

(d) “Training” means providing first-hand field experience to a person who may use a fire fighting foam as part of an emergency fire fighting or fire prevention operation.

(a) The use or discharge of a class B fire fighting foam that contains intentionally added PFAS as part of an emergency fire fighting or fire prevention operation.

(b) The use of class B fire fighting 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 to prevent discharges of the foam to the environment. Appropriate containment, treatment, and disposal or storage measures may not include flushing, draining, or otherwise discharging the foam into a storm or sanitary sewer.

(3m) Notification; safety data sheets. (a) A person who uses or discharges a fire fighting foam under the exemption in sub. (3)(a) shall notify the department of the use or discharge immediately or as soon as practicable without hindering fire fighting or fire prevention operations. A person who possesses a fire fighting foam that may be used under the exemption in sub. (3)(a) shall request and retain any safety data sheets relating to the fire fighting foam and shall make them available to the department for examination after providing the notice under this paragraph.

(b) A person who uses a fire fighting foam under the exemption in sub. (3)(b) shall notify the department immediately of any discharge of the foam to the environment.