NAC445B.576. Vehicles powered by gasoline or diesel fuel: Restrictions on visible emissions and on idling of diesel engines.

     1. A person shall not operate a motor vehicle powered by gasoline which emits smoke.

     2. Except as otherwise provided in subsection 3, visible emissions of diesel-powered motor vehicles or special mobile equipment manufactured:

     (a) Before January 1, 1970, must not exceed an opacity of 40 percent for more than 15 consecutive seconds or for periods aggregating more than 5 minutes in any 1 hour.

     (b) On or after January 1, 1970, must not exceed an opacity of 20 percent for more than 15 consecutive seconds or for periods aggregating more than 5 minutes in any 1 hour.

     3. For the purpose of compliance with the inspection and maintenance program of this State required by subsection 1 of NRS 445B.795, visible emissions of light-duty motor vehicles powered by diesel engines and heavy-duty motor vehicles that are powered by diesel engines and have a manufacturer’s gross vehicle weight rating which does not exceed 14,000 pounds must not exceed an opacity of:

     (a) Thirty percent at an elevation of less than 4,000 feet above mean sea level for more than 5 consecutive seconds or for periods aggregating more than 5 minutes in any 1 hour; or

     (b) Forty percent at an elevation of 4,000 feet or more above sea level for more than 5 consecutive seconds or for periods aggregating more than 5 minutes in any 1 hour.

     4. Except as otherwise provided in this subsection, a person shall not idle the engine of a diesel truck or a bus for more than 15 consecutive minutes. The provisions of this subsection do not apply to a diesel truck or a bus:

     (a) For which the Commission has issued a variance from the requirements of this subsection. A variance is not effective during an air pollution emergency as defined in the air quality plan for the State of Nevada.

     (b) Which is an emergency vehicle.

     (c) Used for the removal of snow.

     (d) Used to repair or maintain other motor vehicles.

     (e) Which is stopped because of traffic congestion while in transit on a highway, roadway or street.

     (f) Which is idling while a repair or maintenance is being performed on it at a shop or facility for the repair and maintenance of motor vehicles.

     (g) The emission from which is contained and treated by a method approved by the Commission.

     (h) The engine of which must idle to perform a specific task for which it is designed such as well drilling, trenching or hoisting. Such a diesel truck or a bus may not idle for more than 15 consecutive minutes during an air pollution emergency as defined in the air quality plan for the State of Nevada.

     5. As used in this section, “mean sea level” means the average level of the sea between high and low tide.

     [Environmental Comm’n, Engine Emission Control Reg. §§ 3.2-3.4, eff. 1-10-78]—(NAC A by Environmental Comm’n & Dep’t of Motor Veh. & Pub. Safety, 11-19-85, eff. 1-1-86; 11-23-87, eff. 1-1-88; A by Environmental Comm’n, 12-26-89; 10-22-92; R130-09, 1-28-2010)—(Substituted in revision for NAC 445.920)