This project is for the construction of an addition to existing facility to meet the total authorized space requirement for the two Aircraft Maintenance Units required to support two KC-46A flying squadrons. The addition consists of expansion on the northwest (flightline) side of the facility to increase the administrative workspace and consolidated tool kit storage area. Construction of the addition includes a reinforced foundation, concrete floor slab, structural steel frame with a split face block and masonry exterior walls, doors and windows, and low slope roof. Work also includes additional lighting and electrical panels, and the expansion of existing Heating Ventilation and Air Conditioning system and existing fire protection system. The project includes site improvements such as new utility lines for the addition, relocation of a privatized 6-inch water main on the flightline side of the facility, and all other work necessary to make a complete and usable facility. Additional site preparation is required for any soil/sediment or ground water that is disturbed during construction to adhere to the MacDill Environmental Restoration Program Contaminated Media Disposal Guidelines document. Soil/sediment being removed during construction must be containerized or stockpiled, then sampled for PFAS Chemicals to determine the course of action for disposal. Groundwater being removed (dewatering) during construction must be containerized, then sampled for PFAS Chemicals to determine the course of action for disposal.