AIR EMISSIONS REGULATIONS:

Air Quality Status	Serious nonattainment for ozone and PM (APCD includes the Eastern portion of Kern County) EPA's Nonattainment Areas
Major Source Threshold	50 tons of NOx or VOC, or 100 tons of PM triggers NSR
Minor Source Permitting Exemption	Less than 50 hp or 3 MMBtu/hr
Minor Source Treatment	BACT
Emergency Generating Limits	200 hours per year

DE MINIMIS EXEMPTIONS (Must meet 1298)

Engines less than 50 hp or turbines less than 3 MMBtu/hr are exempt from permitting.

MINOR SOURCE PERMITTING

All units will be required to apply BACT. The air district follows CARB's guidance for permitting of electric generating technologies. This guidance recommends BACT for all criteria pollutants. Sample BACT for control of NOx from turbines and internal combustion engines is as follows:

Size of Unit	Level of Control (ppm)
>3 MW	9
3-12 MW simple cycle	2.5
3-12 MW combined cycle	5
12-50 MW simple cycle	2.5
12-50 MW combined cycle	5
IC Engines	9

The permitting process generally takes 1-2 months, but could be longer.

A 30-day public comment may be required.

TREATMENT OF EMERGENCY ENGINES

Emergency engines are permitted at 200 hours per year and can only operate during emergencies and for maintenance and testing.