Nevada

AIR EMISSIONS REGULATIONS:

Air Quality Status	The county is in serious nonattainment for PM10 and serious nonattainment for CO, and is designated as subpart I for the 8-hr ozone standards. EPA's Nonattainment Areas
Major Source Threshold	70 tons of PM10 or 50 tons of CO triggers NSR. 250 tons of any other criteria pollutant triggers PSD
Minor Source Permitting Exemption	None
Minor Source Treatment	BACT
Emergency Generating Limits	Hourly limit and BACT

DE MINIMIS EXEMPTIONS

Emergency standby generators and stationary internal combustion engines with a rating of < 35 hp or < 26 kw; are exempt from the permitting process. The following stationary sources are also exempt –

Stationary sources containing only natural gas fuel burning equipment with an aggregate maximum rate heat input less than 4 MMBtu/hr, which includes units with less than 1 MMBtu/hr maximum heat input;
Containing only 1 emergency generator powered by an internal combustion engine of less than 500 hp and tested less than 150 hrs per year;

MINOR SOURCE PERMITTING

All units must obtain a permit. BACT is required for all criteria pollutants. The county does not have a BACT cost threshold established, rather permitting officials will look for a "breaking point" in the cost of controls. This is a point where the cost of an additional control becomes significantly more expensive then each addition before it, this is the "breaking point." Sources with potential emissions above the following must complete LAER:

PM10: 5 tons per year or 20 pounds per day
CO: 25 tons per year or 150 pounds per day or 15 pounds per hour
VOCs: 40 tons per year or 300 pounds per day or 30 pounds per hour

The length of the permitting process can vary widely, there is a no official time restriction.

TREATMENT OF EMERGENCY ENGINES

Emergency generators will typically be permitted at 52 hours per year or less and must complete a BACT analysis.

Clark County-NEVADA

AIR EMISSIONS REGULATIONS: