Nevada Administrative Code › Chapter 445A - Water Controls › ON-SITE SEWAGE DISPOSAL SYSTEMS › Permits for Construction, Alteration or Expansion of Systems › Section 445A.9602 - General requirements for system

Current through June 11, 2024
1. A permit must
				not be issued for the construction or operation of an on-site sewage disposal
				system that is likely to pollute any waters of the State or create a public
				health hazard. If, in the judgment of the Division or other administrative
				authority, the minimum standards set forth in NAC 445A.950 to 445A.9706,
				inclusive, will not adequately protect the waters of the State or the public
				health due to circumstances unique to the site or the intended use of the
				system, the Division or other administrative authority shall require an on-site
				sewage disposal system to meet additional requirements that will provide
				adequate protection. Such additional requirements may include, without
				limitation, increased setback, increased drain field size, additional treatment
				or use of an alternative system. The Division or other administrative authority
				shall deny the construction or operation of an on-site sewage disposal system
				if it is determined that the construction or operation of the system will
				impact the waters of the State or is in an area where a moratorium on such
				systems has been established. The Division or other administrative authority
				shall provide an applicant with a written statement of the specific reasons for
				more stringent requirements or why a permit was denied under this
				subsection.
2. The minimum land
				area required for an on-site sewage disposal system is 43.5 square feet per
				gallon of projected daily sewage flow per day, which is the equivalent of 1,000
				gallons of flow per acre per day, and must include a backup area equal to the
				size of the effluent absorption area which must be set aside for future use.
				The use of an advanced wastewater treatment unit may allow for a reduction that
				is not more than 25 percent in land area, if the design engineer can
				demonstrate to the satisfaction of the Division or other administrative
				authority that the on-site sewage disposal system will not adversely impact the
				local groundwater or surface water.
3. An on-site sewage disposal system with
				projected daily sewage flow greater than:
(a)
				Fifteen thousand gallons per day, or which receives flows other than domestic
				sewage, must obtain an individual permit from the Division or other
				administrative authority.
(b) Five
				thousand gallons per day may be required by the Division or other
				administrative authority to obtain a groundwater mounding analysis. If required
				by the Division or other administrative authority, the design engineer shall
				submit sufficient site-specific data which predicts both the height of the
				water-table mound that will develop beneath the field and the rate of lateral
				and vertical flow away from the absorption area. The site will be deemed
				unsuitable if the data predicts that the water-table mound that will develop
				beneath the site cannot be maintained 4 feet or more below the bottom of the
				absorption area or if it is determined that effluent is likely to become
				exposed onto the ground surface.