(5) Those lands within park which are set aside for management services such as employee housing, maintenance and storage facilities water and electric plants, communication towers sanitary land fills, etc. In so far as possible, these installations will be visually and acoustically isolated from visitor use areas When a single small facility of this nature is found isolated from the core of administrative and management facilities, it is probably not advisable to create a zone around it, but to simply incorporate it into the zone in which it exists, perhaps a recreational zone. This type of zone should only be created for concentrations of this kind of facility and not for isolated structures This type of zone might be called an administrative or special use.