A separate room or area shall be provided for filling bulk bins, drums, bags or other bulk containers and be constructed to conform to § 59a.302 (relating to buildings). The number of control panels and switchboxes in this area shall be kept to a minimum. Control panels must be mounted a sufficient distance from the walls to facilitate cleaning or be mounted in the wall and provided with tight-fitting removable doors to facilitate cleaning. An adequate exhaust system shall be provided to minimize the accumulation of product dust within the packaging room and, where needed, a dust collector shall be provided and properly maintained to keep roofs and outside areas free of dry product. Only packaging materials that are used within a day’s operation may be kept in the packaging area. These materials shall be kept on metal racks or tables at least 6 inches off the floor. Unnecessary fixtures, equipment or false areas which may collect dust and harbor insects, may not be allowed in the packaging room.