25-1812: A resolution approving a proposed Second Amendment between the City and County of Denver and FRONTIER AIRLINES, INC. concerning the conversion of the Aqueous Film Forming Foam (AFFF) fire suppression system at the Frontier Hangar at Denver International Airport. Amends a hangar lease agreement with Frontier Airlines for rates and charges to reflect funding for the Aqueous Film-Forming Foam (AFFF) / Per-and Polyfluoroalkyl substances (PFAS) fire system conversion at the Frontier Hangar at Denver International Airport (DEN). No change to agreement term, in Council District 11 (PLANE-201948113/PLANE-202473381-02). The last regularly scheduled Council meeting within the 30-day review period is on 12-15-2025. The Committee approved filing this item at its meeting on 11-12-2025.