The Different Kinds of NSR Authorizations

Now that we've touched on the basic functions of the Air Permits Division and covered some key permitting terms, let's get into the different authorizations evaluated by division staff. The division has a "pyramid" approach to permitting as identified below.


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Note that this "pyramid" approach does allow sources and facilities to use a less complex authorization mechanism if emissions are appropriately reduced.

For example:
A facility that qualifies for a PBR can make a process change that results in a reduction of emissions allowing the facility to be considered de minimis. After the implementation of the process change, the facility would be considered de minimis, and the PBR would not be necessary.

More detailed information regarding each level of the permitting pyramid can be found on the following pages.

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