AIR EMISSIONS REGULATIONS:

Air Quality Status	The entire county is in attainment for ozone under EPA standards. However, the county has not attained the California air standards for ozone and PM-10. (The APCD is all of Santa Barbara County) EPA's Nonattainment Areas
Major Source Threshold	A potential to emit 100 tons per year of any criteria pollutant
Minor Source Permitting Exemption	A source that emits less than 1 ton per year of any uncontrolled pollutants
Minor Source Treatment	Determined on a case-by-case basis
Emergency Generating Limits	CARB limits

DE MINIMIS EXEMPTIONS (Must meet 1298)

A source that emits less than 1 ton per year of any uncontrolled criteria pollutant.

Any change in an existing facility that meets the following requirements will be exempt from permitting:

The emission increase for any one emission unit shall not exceed 2.40 lbs/day of any affected pollutant, except CO, which shall not exceed 19.20 lbs/day.

The aggregate emissions increase at the source due to all de minimis physical changes at the source since November 15, 1990, shall not exceed –

• 24.00 lbs/day,
• Except CO, which shall not exceed 60.00 lbs/day.

A permit is also, not required for new, modified, or existing stationary sources that emit less than 1 ton per year unless the sources is subject to EPA, NSPS, or HAP requirements.

The owner or operator must keep a record of these de minimis changes.

Internal Combustion Engines

The following are exempt from obtaining a permit:

- Compression ignition engines with a bhp of 50 or less

- Spark ignition piston-type internal combustion engines with a maximum rating of 100 bhp or less or gas turbine engines with a maximum heat input rate of 3 MMBtu/hr or less at standard conditions, except if the total hp or individual spark ignition piston-type internal combustion engines less than 100 bhp but greater than 20 bhp at a stationary source, as defined in Rule 102, exceeds 500 bhp in which case the APCD rule 202 individual engines are not exempt

Combustion Equipment (Other than Internal Combustion Engines)

Combustion Equipment with a maximum heat input of less than 5MMBtu/hr is exempt if fired exclusively with one of the following:

- Natural or produced gas which meets General Order 58-A of the Public Utility Commission

- Liquefied petroleum gas, which meets Gas Processors Association Standards

- Or a combination of the above mentioned fuels

Combustion equipment with a maximum heat input rate of 1MMBtu/hr or less is exempt and does not count towards the 25 tons per calendar year stationary source exemption threshold listed above in this paragraph provided that the equipment is fired exclusively with the above mentioned fuels or combination thereof.

MINOR SOURCE PERMITTING

All units with a potential to emit greater than 25 pounds per day of a criteria pollutant will be required to apply district BACT. The air district follows CARB's guidancefor permitting of electric generating technologies. 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

Sources with potential emissions of 120 pounds per day or greater are required to complete air quality modeling. No limitations will be imposed on sources with potential emissions less than 25 pounds per day.

Permitting generally takes 60-90 days, but can take 120 days or more if a public comment period is required.

TREATMENT OF EMERGENCY ENGINES

Emergency engines are exempt from permitting if they re operate less than 200 hour per year. These units must keep records and can only operate during emergencies and maintenance. The district is in the process of changing to a more stringent rule. CARB Air Toxic Control Measures for Stationary Compression Engines apply (see the CA state page for more information).