AIR EMISSIONS REGULATIONS:

Air Quality Status	All areas are in attainment (AQMD is the Northeast portion of Los Angeles County) EPA's Nonattainment Areas
Major Source Threshold	250 tons triggers PSD
Minor Source Permitting Exemption	Less than 50 hp or 2.975 MMBtu/hr
Minor Source Treatment	BACT
Emergency Generating Limits	None

DE MINIMIS EXEMPTIONS (Must meet 1298)

Engines less than 50 hp, or turbines less than 2.975 MMBtu/hr.

MINOR SOURCE PERMITTING

The air district requires BACT for sources that have a potential to emit 25 pounds per day of a criteria pollutant. Officials will consider CARB's guidance for BACT, but will complete their own analysis based on a world-wide search of technologies. Sample BACT for control of NOx from turbines and internal combustion engines is as follows:

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

Sources with potential emissions less than 25 pounds per day of all criteria pollutants may receive limits based on the permitting official's discretion.

The permitting process can take up to 180 days. A public comment period of 30 days is required.

TREATMENT OF EMERGENCY ENGINES

Emergency engines must obtain a minor source permit. There is no special treatment for these units.