Remediation of asbestos-containing materials on railway wagons railway is done inside a structural unit dedicated to the reclamation of the M.C. A., 29 which is accessed only by qualified operational staff. This unit consists of a set of premises, one after the other, separated by doors, which constitutes the units for personnel decontamination, and it also has a confined area where the wagons which need to be worked on are placed, called Zone “A” or processing area. The confinement of the unit dedicated to remediation is obtained through static and dynamic barriers: the static barrier is constituted by the structural and accessory divisions (doors, windows, windows, etc.) delimiting the area of the unit of decontamination of personnel and Zone “A”.