Section 440.10 - Sewage Disposal(1) All gray and black waste water shall be discharged to a sanitary drainage system connected to a public sewerage system; provided, that if because of non-availability, distance, or ground conditions, connection to a public sewerage system is not practicable, any other means of sub-surface disposal of sewage may be installed after approval by the board of health and in compliance with 310 CMR 15.00: Subsurface Disposal of Sanitary Sewage (Title V).(2)Holding tank dumping station(a) Holding tank dumping stations shall be connected to a municipal sewerage system or to subsurface facilities designed in accordance with 310 CMR 15.00: Subsurface Disposal of Sanitary Sewage (Title V) and shall consist of a four inches diameter inlet with a hinged or chained cover. The inlet shall be surrounded by a concrete apron pitched to drain into the inlet and curbed to exclude adjacent surface water.(b) A water tap and hose shall be provided for cleanup of the area as necessary. This tap shall be equipped with a vacuum breaker to prevent back siphonage and be posted as not to be used for drinking or filling of water tanks.(c) At least one accessible and operable dumping station inlet shall be provided for each 100 camp sites or fraction thereof except sites with a sewer connection. Septic tanks at dumping stations may have properly designed multiple inlets to conform to 105 CMR 440.00. Any campground restricted strictly to tent camping and backpackers shall be exempt from 105 CMR 440.00.(d) Mobile Units, if provided for pumping out holding tanks on self-contained units, shall be constructed and operated to prevent any leakage, odors, or other nuisance.(e) No sink wastes may be thrown on the surface of the ground or disposed of in open pits. At least one leaching pit for sink wastes only shall be provided for each four camp sites where other conveniently located dumping stations are not available. The leaching pit shall be covered and be in accordance with 105 CMR 440.06(5).