; and (B) twice the quantity carried onboard each required truck available in the fire station for the eligible airport. (2) The disposal of per- or polyfluoroalkyl products, including fluorinated aqueous film-forming agents, to the extent such disposal is necessary to facilitate the transition to an acceptable fluorine-free agent, including, but not limited to, aqueous film-forming agents currently in fire-fighting equipment, vehicles, and wastewater generated during the cleaning of fire-fighting equipment and vehicles. (3) Cleaning or disposal of existing equipment or components thereof, to the extent such cleaning or disposal is necessary to facilitate the transition to an acceptable fluorine-free agent. (4) Any equipment or components thereof necessary to facilitate the transition to an acceptable fluorine-free agent. (5) Replacement of aircraft rescue and firefighting (ARFF) equipment as determined by the Secretary as necessary to be replaced. (b) Distribution of funds (1) Grants to replace ARFF vehicles (A) In general The Secretary shall reserve up to $30,000,000 of the amounts appropriated to carry out the PFAS replacement program to make grants to each eligible airport that is designated under part 139 as an Index A airport and does not have existing capabilities to produce fluorine-free foam, to replace aircraft rescue and firefighting (ARFF) vehicles. (B) Amount No grant made to an eligible airport under subparagraph (A) shall exceed $2,000,000. (2) Remainder (A) Determination of need With respect to the amount of firefighting foam concentrate required for foam production commensurate with applicable aircraft rescue and firefighting (ARFF) equipment required in accordance with the most recent FAA-approved Airport Certification Manual, the Secretary shall determine— (i) the total amount of such concentrate required for all of the Federally required aircraft rescue and firefighting (ARFF) vehicles that meet index requirements under part 139 of each eligible airport, in gallons