(A) Sumps. Any sump included in new construction that is exposed to soil or granular subslab material that may or may not be connected to a subsurface drainage system shall be covered with a gasketed or otherwise sealed lid and, if applicable, shall be constructed to accommodate a vent pipe for a passive radon mitigation system, a sump pump with discharge pipe, and or a trapped inlet when used a floor drain.
(B) Passive radon mitigation system. Unless specifically exempted by this chapter, all new construction shall include, at a minimum a passive radon mitigation system. A passive radon mitigation system shall consist of the following:
(1) Vent pipe. The vent pipe shall be a minimum three-inch diameter acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVQ), or an approved equivalent gas-tight pipe.
(a) For vent pipes that are connected to a subsoil drainage system, the vent pipe shall be inserted directly into an interior perimeter drainage pipe loop or through a sealed sump cover if the sump is exposed to the subslab permeable material directly or if it’s connected to a subsoil drainage system.
(b) For vent pipes that are embedded directly into the subslab permeable material, prior to the pouring of the basement slab, the vent pipe shall be installed vertically with a “T” fitting of the same size (or equivalent method) such that the horizontal openings are 100% exposed to the subslab permeable material.
(c) 1. In buildings where interior footings or other barriers separate the subslab gas-permeable material, each area shall be fitted with an individual vent pipe.
2. Individual vent pipes shall either connect to a single vent pipe that terminates above the roof or shall terminate separately above the roof.
(d) 1. All vent pipes shall be extended up through the building floors and terminate at least 12 inches above the surface of the roof in a location at least ten feet away from any window or other opening into the conditioned spaces of the building that is less than two feet below the exhaust point and ten feet from any window or other opening in adjoining or adjacent buildings.
2. The vent pipe shall be located within the attic space in an area that will allow 30-inch clearance height or other approved location.
(2) Power source. In order to provide for the future installation of an active radon mitigation system, an electrical circuit terminated in an approved box shall be installed during construction in the attic or other anticipated location of vent pipe fans.
(Ord. 2021-6.13, passed 6-14-2021)