Trash receptacles shall be kept in enclosures made of solid wood, metal, brick, or masonry block which conceal them from view. Access doors shall be made of solid wood or metal. When possible, enclosures should be incorporated into the building (i.e., wing walls, alcoves). If free standing, the enclosures shall be constructed of materials which are compatible with other structures on the site. Chain link fencing, with or without slats, for this purpose is prohibited.