Stationary Sources

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Permitting

There are several different types of air quality permits depending on the type of activity and emission rates of air pollutants.  The following list explains each different type of permit.

Stationary Source Permits

Class I
Class II
Class III
General

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Class I Permits

Class I permits are issued to any source that meets the requirements of Pima County Code (P.C.C.) Title 17, Section 17.12.140(B)(1).   Such sources include:

Any major source.  A "major" source as defined by P.C.C. Title 17, Section 17.04.340(A)(128) is any source that has the potential to emit 100 tons per year of any air pollutant as defined in section 302 of the Clean Air Act, which includes fugitive emissions of such pollutant.  A source is also considered major if it has the potential to emit 10 tons per year of any single hazardous air pollutant or 25 tons per year of any combination of such hazardous air pollutants.
Any affected source.   An "affected" source as defined by P.C.C. Title 17, Section 17.12.340(A)(12) is any source that includes one or more units which are subject to emission reduction requirements or limitations under Title IV of the Clean Air Act.
Solid Waste Incineration Units. subject to section 129(e) of the Clean Air Act.
Designated. Any source in a source category designated by the Administrator pursuant to 40 CFR 70.3 and adopted by the control officer by rule.

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Class II Permits

Class II permits are issued to any source that meets the requirements of P.C.C. Title 17, Section 17.12.140(B)(2).  Such sources include:

• Any source, including an area source, subject to a standard, limitation, or other requirement under section 111 of the Clean Air Act.
• Any source, including an area source, subject to a standard or other requirement under section 112 of the Clean Air Act, except that a source is not required to obtain a permit solely because it is subject to regulations or requirements under section 112(r) of the Clean Air Act.

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Class III Permits

Class III permits are issued to any source that meets the requirements of P.C.C. Title 17, Section 17.12.140(B)(3).  Such sources include:

• Any source that has the potential to emit, without controls, significant quantities of regulated air pollutants.
• Stationary rotating machinery of greater than 325 brake horsepower.
• Fuel-burning equipment which, at a location or property other than a one or two family residence, are fired at a sustained rate of more than one million BTU per hour for more than an eight hour period.

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General Permits

A general permit is a pre-approved permit and certificate that covers a specific class of sources.  A general permit differs from an individual permit in that it can be applied to more than one source, is usually more restrictive, less expensive, and requires a shorter period of time for the processing and issuance of an Authorization to Operate (ATO).  By the issuance of a general permit, PDEQ indicates that it approves the activities authorized by the general permit, provided that the owner or operator of the source, registers with PDEQ and meets the requirements of the general permit.

When a source applies for coverage under an individual permit it must go through its own public notice and possibly a public hearing.  Since the general permit is written to cover sources that are similar, it must go through public notice and public hearing only once.  Each source that is covered by the general permit will not be required to go through its own public notice and public hearing.  However, a list of sources that have been covered under the general permit will be published periodically.  This publication will be the public's only notification that a specific source has been given coverage under the general permit.

Once a general permit has been developed, sources may apply for coverage under the general permit instead of obtaining individual permits.  If the sources meet the criteria for coverage under the general permit, an Authorization to Operated (ATO) is issued for each major piece of equipment covered under the permit.  The ATO allows for easy tracking of permitted equipment and assists inspectors in verifying coverage while conducting inspections.

picture of folder with a right arrowGeneral Permit Application & Other Forms

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You may contact the Air Program for further assistance.
520-724-7400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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