Protecting Public Health and the Environment.
Applicants for air quality permits must submit emission inventories to satisfy applicable rules. If emission inventories are not sufficiently documented, the application will be determined incomplete or denied.
Prior to preparing any emission inventory or application materials, it is strongly recommended that the applicant request a meeting or teleconference with DEQ to discuss the applicant’s responsibilities. Contact DEQ’s Air Quality Permit Hotline at 1-877-5PERMIT (1-877-573-7648) to schedule a meeting. Applicants are also encouraged to call the hotline to ask questions as they prepare the application.
The type of inventory that must be submitted depends on the type of project being proposed and the type of permit required (e.g., new facility or modified facility).
The table below lists the types of emission inventories that must be submitted for each application type and provides links to applicable application templates. Applicants must use the templates, document all calculations, and follow all instructions.
All emission inventories must be submitted with sufficient documentation that the public and DEQ can verify the validity of the emission estimates. The emission inventories will be subjected to technical review.
Types of Emission Inventories(Follow link to applicable required application.)
(1) Under certain circumstances, an existing facility wide PTE inventory may not be required. Contact DEQ to determine if one must be submitted. Under all circumstances, the applicant must prove the existing facility classification.
Air quality permits often include emission rate limits equivalent to estimated emissions included in the application; these are the rates that the applicant has shown demonstrate compliance. If the source exceeds the permitted emission rate limit, it is operating in violation of its permit. In estimating emissions that are used to demonstrate compliance, it may be wise for the facility to request a compliance buffer component of up to 120% of what would have otherwise been estimated (i.e., increase emissions by a factor of 1.2).
If a compliance buffer component is requested, all compliance demonstrations provided by the applicant (i.e., modeling and toxic air pollutant assessments) must include the buffer.