The William Jefferson Clinton Federal Building (formerly Ariel Rios) was constructed in 1934 to house the Post Office Department headquarters and serve as the linchpin of the Federal Triangle plan. This project’s scope is to repair, re-point and clean the damaged limestone on the 12th street Hemicycle and arcade. In addition, Meridien Group provided metal conservation services to clean and re-patinate the bronze doors, grates and light fixtures. The project is a design build project, in order to fully identify the extent of the damage and develop recommendations for the appropriate repair and cleaning methodologies. Cleaning will also include the floor within the arcade. The scope of services will address the limestone arcade that fronts 12th street, between Constitution and Pennsylvania avenue.