Naming the higher-standard areas precisely
The list has to be by room, not by floor or by tenant. A treatment room, a preparation area and a sample store might all sit on a level otherwise made up of ordinary offices. Writing the level into the scope means paying a premium for meeting rooms that never needed it, and blurring the point at which the more careful method starts and stops.
Each named area then gets its own entry describing the method, the equipment, the sequence relative to other rooms and what evidence the client wants recorded. That evidence requirement matters more than it looks. An area held to a higher standard without a record of when it was serviced is difficult to defend if anyone ever asks, and the record is easier to build in from the start.
