Providing all qualified supervision, labor, transportation, material, including all welding wire and rod, welding gases, grinding wheels, and all other consumables, construction tools, and equipment required to remove and replace 144 catalyst modules and 144 cover grates and installation of 4 lay down catalyst doors in the second and third layers of both casings in accordance with Technical Specifications attached and incorporated herein by reference. providing all qualified supervision, labor, transportation, material, including all welding wire and rod, welding gases, grinding wheels, and all other consumables, construction tools, and equipment required to remove and replace 144 catalyst modules and 144 cover grates and installation of 4 lay down catalyst doors in the second and third layers of both casings in accordance with Technical Specifications attached and incorporated herein by reference. For further clarification, the catalyst modules will be provided by Ceram USA, Inc. and catalyst doors will be provided by Boiler Tube Company of America/IMTEC.