From the turn of the century until the 1970s, asbestos was widely used in various building materials. It is commonly present in insulation materials found on pipes, ducts, and boilers, in acoustical insulation, and in fireproofing materials. Vandalism and abuse, as well as routine maintenance, repairs, or replacements of items that contain asbestos may release airborne asbestos fibers which are health risks. Areas that pose a health risk are evaluated and, if necessary, cleaned up. In conjunction with those cleanup operations, a comprehensive survey of asbestos material locations is an ongoing process, along with the condition of the installations. Removal will be scheduled and undertaken when necessary. Meanwhile, the Safety Office is monitoring known and suspected sites and is working with Physical Plant personnel for the removal or repair of materials required.