Legacy Fluorotelomer AFFF
These foams were manufactured and sold in the U.S. between the 1970s and 2016, encompassing all other AFFF brands except 3M’s Light Water. Although they were not made with PFOA, they contain polyfluorinated substances that transform into PFCAs, including PFOA. Several manufacturers produced legacy fluorotelomer AFFF that met the Mil-Spec criteria and were used across the U.S. on military bases, airports, and firefighting facilities for extinguishing fuel-based fires. This type of AFFF was not phased out, and it is still used by most military and firefighting facilities in the U.S. to extinguish type B (fuel-based) fires. The 2020 National Defense Authorization Act required the Department of Defense (DoD) to stop using PFAS-laden AFFF by October 2024, with a possible one-year extension. It also banned the usage of these foams for firefighting training purposes.
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