Section 440.09 - Lavatories and Showers(1) At least one shower and one lavatory or wash basin shall be provided for every 30 sites, or fraction thereof. Campgrounds with areas dedicated to self-contained units and which areas have water, electricity and sewer hookups may have a reduced number of lavatories, wash basins and showers depending on actual operating experience and at the discretion of the approving authority. Wash basins shall be so located as to facilitate their use, particularly after use of toilets.(2) If indoor showers are provided, every indoor shower room floor shall be washed daily with a suitable washing agent and water. It is recommended that a rinse with a chlorine solution having a strength of not less than .05% available chlorine be used as an additional safeguard.(3) The use of wooden or metal duckboards is prohibited. Only materials approved by the approving authority may be used.(4) Each shower room and bathroom shall be ventilated to the outdoors.(5) All lavatories, wash basins, showers, and bathtubs shall be maintained in good working order and in a clean and sanitary condition.