Contractor will provide all personnel, equipment, tools, materials, supervision, and other items and non-personal services necessary to demolish/dispose of and install new piping (ducting) in Building... Contractor will provide all personnel, equipment, tools, materials, supervision, and other items and non-personal services necessary to demolish/dispose of and install new piping (ducting) in Building 9 ventilation system at MSHA Approval and Certification Center.