Nevada Administrative Code

NAC 445A.957 “Total suspended solids” defined. (NRS 445A.425) “Total suspended solids” means the total amount of filterable solids in a water sample, measured in milligrams per liter. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9572 “Treatment unit” defined. (NRS 445A.425) “Treatment unit” means a septic tank or other system designed to treat sewage before its release into an effluent absorption system. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9574 “Vector attraction” defined. (NRS 445A.425) “Vector attraction” means the natural attraction of living organisms, including, without limitation, insects, rodents and birds, that are capable of transmitting a pathogen from one organism to another, to sewage, effluent…

NAC 445A.9576 “Waters of the State” defined. (NRS 445A.425) “Waters of the State” has the meaning ascribed to it in NRS 445A.415. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.959 Purpose. (NRS 445A.425, 445A.490) 1. The purpose of NAC 445A.950 to 445A.9706, inclusive, is to prescribe the requirements for on-site sewage disposal systems for the protection of the public health, safety and welfare of the people of the State of Nevada. 2. The pro…

NAC 445A.9592 Adoption of publications by reference. (NRS 445A.425) The following publications are hereby adopted by reference: 1. The Uniform Plumbing Code, 2006 edition, published by the International Association of Plumbing and Mechanical Officials. A copy of this publication …

NAC 445A.9594 Administrative authority may develop its own regulations under certain circumstances. (NRS 445A.425, 445A.490) 1. An administrative authority that enters into an agreement with the Division to regulate on-site sewage disposal systems within the jurisdiction of the a…

NAC 445A.960 Division assumes no responsibility for successful operation of system; permit is revocable privilege. (NRS 445A.425, 445A.490) The Division, by review and approval of the plans and specifications for an on-site sewage disposal system and the issuance of a permit purs…

NAC 445A.9602 General requirements for system. (NRS 445A.425, 445A.445, 445A.490, 445A.500) 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…

NAC 445A.9604 Exemptions. (NRS 445A.425, 445A.500) Except as otherwise provided in this section, the Division or other administrative authority may grant an exemption from any provision of NAC 445A.950 to 445A.9706, inclusive, to the holder of a permit to operate an on-site sewag…

NAC 445A.9606 Order limiting or prohibiting construction authorized in certain circumstances; designation of nitrogen management areas by Division. (NRS 445A.425, 445A.490, 445A.500) 1. Whenever the Division or other administrative authority determines that the construction of an…

NAC 445A.9608 Letter of approval to construct, alter or expand system: Required provisions. (NRS 445A.425, 445A.445, 445A.475, 445A.480, 445A.500, 445A.505, 445A.515) 1. A letter of approval must be obtained from the Division or other administrative authority to construct, alter …

NAC 445A.961 Letter of approval to construct, alter or expand system: Engineering report. (NRS 445A.425) 1. The engineering report required pursuant to NAC 445A.9608 must include, without limitation, a soils analysis performed by a qualified person approved by the Division or oth…

NAC 445A.9612 Letter of approval to construct, alter or expand system: Plot plan. (NRS 445A.425) The plot plan required pursuant to NAC 445A.9608 must include: 1. The title and date of the plot plan and the scale to which the plot plan is drawn, with the direction north clearly i…

NAC 445A.9614 Letter of approval to construct, alter or expand system: Design specifications. (NRS 445A.425) 1. The design specifications required pursuant to NAC 445A.9608 must include evidence that the proposed design for the on-site sewage disposal system is prepared in accord…

NAC 445A.9616 Information that demonstrates any new innovative technologies, materials or designs for system or component of system that achieves equal or greater performance than system that meets general requirements. (NRS 445A.425, 445A.445, 445A.515) 1. The design engineer ma…

NAC 445A.9618 Inspection of construction during critical phases by design engineer; certificate of completion. (NRS 445A.425, 445A.430, 445A.475, 445A.500) 1. The design engineer shall inspect the construction of the proposed on-site sewage disposal system during critical phases …

NAC 445A.962 Nature and duration of permit; when system deemed to have failed; prohibited activities. (NRS 445A.425, 445A.475) 1. A permit issued by the Division or other administrative authority pursuant to NAC 445A.950 to 445A.9706, inclusive, authorizes the holder of the permi…

NAC 445A.9622 Modification, revocation, suspension or cancellation of permit. (NRS 445A.425, 445A.500, 445A.515) 1. Except as otherwise provided in NRS 445A.600, the Division or other administrative authority may modify, revoke, suspend or cancel a permit at any time upon a deter…

NAC 445A.9624 Request for letter of approval to construct or application for permit to operate system: Denial by Division or other administrative authority. (NRS 445A.425, 445A.490, 445A.500) 1. Except as otherwise provided in this section, a request for a letter of approval to c…

NAC 445A.9626 Request for letter of approval to construct or application for permit to operate system: Procedure for review of actions taken by Division or other administrative authority. (NRS 445A.425) Except as otherwise provided in NRS 445A.605 and 445A.610: 1. A person who su…

NAC 445A.9628 Request to alter design or increase capacity of existing system; request for extension of time to complete construction; issuance of new general permit upon completion of construction. (NRS 445A.425, 445A.445, 445A.505) 1. A person shall not alter the design or incr…

NAC 445A.963 Fees. (NRS 445A.425, 445A.430) 1. For an on-site sewage disposal system that is under the jurisdiction of the Division, the owner must pay the following fees: One-time application fee for a general permit to construct or make major modifications to an on-site sewage …

NAC 445A.9632 Annual reports. (NRS 445A.425, 445A.450) An owner or operator of an on-site sewage disposal system shall submit annually all reports as specified in the permit. In addition to the information required by the permit, each annual report must include a written certific…

NAC 445A.9634 Transfer of permit to new owner or operator of system. (NRS 445A.425) A permit may be transferred to a new owner or operator of the on-site sewage disposal system upon application to the Division or other administrative authority. Until notice is given by the Divisi…

NAC 445A.965 Setbacks. (NRS 445A.425) 1. The setbacks, defined as the minimum horizontal separation, that must be maintained between the perimeter of the specific components of an on-site sewage disposal system and the listed features include: Minimum Horizontal Distance, in clea…

NAC 445A.9652 Cleanouts. (NRS 445A.425) A cleanout which conforms to the Uniform Plumbing Code, as adopted by reference in NAC 445A.9592, must be installed between each building drain and each sewer line which leads to an on-site sewage disposal system. The cleanout must be locat…

NAC 445A.9654 Treatment of domestic sewage; pretreatment of sewage. (NRS 445A.425) 1. Domestic sewage flowing to an on-site sewage disposal system must be treated by a treatment unit such as a septic tank, an aerobic wastewater treatment unit, a nitrogen removal wastewater treatm…

NAC 445A.9656 Septic tanks: Minimum capacity determined by projected daily sewage flow. (NRS 445A.425) 1. The minimum capacity of a septic tank used in an on-site sewage disposal system must be based on the projected daily sewage flow and other considerations specified in subsect…

NAC 445A.9658 Septic tanks: General requirements. (NRS 445A.425) 1. A septic tank included as part of an on-site sewage disposal system must: (a) Be constructed of durable materials designed to withstand expected physical loads and corrosive forces. (b) Be verified watertight by …

NAC 445A.966 Aerobic wastewater treatment unit. (NRS 445A.425, 445A.480) 1. If the Division or other administrative authority determines that the degradation of groundwater or the constraints of the site of the on-site sewage disposal system require an effluent which is of a high…

NAC 445A.9662 Nitrogen removal wastewater treatment unit. (NRS 445A.425, 445A.480) 1. If the Division or other administrative authority determines that the degradation of groundwater or the constraints of the site of the on-site sewage disposal system require effluent which is of…

NAC 445A.9664 Dosing tanks. (NRS 445A.425) 1. Dosing tanks are required where: (a) It is necessary to raise the elevation of wastewater for further treatment or disposal of sewage; (b) Intermittent dosing of the disposal field is desirable; (c) A pressure distribution system is u…

NAC 445A.9666 Effluent absorption system. (NRS 445A.425) 1. The effluent from a septic tank or other treatment unit must be disposed of through a soil absorption trench or other effluent absorption system pursuant to NAC 445A.9666 to 445A.969, inclusive, and approved by the Divis…

NAC 445A.9668 Performance of percolation test. (NRS 445A.425) 1. If a percolation test is performed pursuant to NAC 445A.961, the test must be performed by a qualified person, including, without limitation, a design engineer, a soils scientist or a geologist, approved by the Divi…

NAC 445A.967 Determination of soil characteristics using alternative method in lieu of percolation test. (NRS 445A.425) 1. In lieu of performing a percolation test, the design engineer, soils scientist or geologist performing an investigation of soil characteristics to prepare an…

NAC 445A.9672 Classification of soil types. (NRS 445A.425) The following is a table which must be used for the classification of soils types: (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9674 Calculation of required size of effluent absorption area. (NRS 445A.425) 1. The required size of the effluent absorption area for an on-site sewage disposal system must be calculated based on the long-term acceptance rate of the soil at the site, unless the system u…

NAC 445A.9676 Absorption trench system. (NRS 445A.425) 1. An on-site sewage disposal system may use absorption trenches as the effluent absorption system, unless limiting conditions exist at the site which preclude such use, including, without limitation, high groundwater, highly…

NAC 445A.9678 Alternative absorption system. (NRS 445A.425) 1. If an on-site sewage disposal system cannot use absorption trenches pursuant to NAC 445A.9676 because of limiting conditions, including, without limitation, high groundwater, highly permeable stratum, sloping terrain …

NAC 445A.968 Absorption bed. (NRS 445A.425) 1. If the use of an absorption trench is not practical, an absorption bed may be used in lieu of an absorption trench, if justified by the design engineer. The bottom of the absorption bed must serve as the primary absorptive medium. 2.…

NAC 445A.9682 Stepped network of trenches using relief lines. (NRS 445A.425) 1. On sloping terrain where a conventional absorption trench or bed system cannot be installed or is not practical, a stepped network of trenches using relief lines between the trenches may be used. 2. A…

NAC 445A.9684 Capping fill trench. (NRS 445A.425) 1. Except as otherwise provided in subsection 2, a capping fill trench may be used where conditions relating to high groundwater prohibit the installation of an absorption trench pursuant to NAC 445A.9676. 2. A capping fill trench…

NAC 445A.9686 Elevated mound system. (NRS 445A.425) 1. An elevated mound system consists of a suitable fill material, an absorption area made of coarse aggregate and fill material with a distribution network, and a soil cap. In an elevated mound system, the effluent must be gravi…

NAC 445A.9688 Intermittent sand filter system. (NRS 445A.425) 1. In an intermittent sand filter system, the effluent must be pumped or siphoned into the absorption area and through a distribution network located in the upper part of a sand filter containment vessel. The upper par…

NAC 445A.969 Pressure distribution system. (NRS 445A.425) 1. A pressure distribution system may be used in conjunction with any effluent absorption system that uses distribution pipes. A pump must be used to pressurize the pressure distribution system. 2. The active dosing volume…

NAC 445A.9692 Holding tank system. (NRS 445A.425) 1. The installation of a holding tank system for domestic sewage, including, without limitation, any vault toilets or temporary holding tanks, requires a permit. The Division or other administrative authority may issue a permit fo…