System Venting

Systems to be located either in whole or in part under driveways, parking or turning areas or other areas of impervious material shall be designed to achieve proper venting of the system according to the following criteria: (a) the disposal area distribution system shall be piped to the atmosphere using the same diameter pipe as the distribution system; (b) the vent pipe shall be designed to prevent entrance of animals or precipitation and shall be backfilled tightly to prevent seepage of surface water into the system; (c) the vent pipe shall be located beyond the limit of the impervious area subject to vehicular traffic; (d) where trenches, fields or beds are used, the end of each distribution lateral shall be connected to one or more vent(s); (e) where pits are used, the vent shall extend under the cover of the pit; and (f) the riser and above ground components of the vent shall be constructed of durable, non-corrosive materials.