Instructions, References and Help for Completing an Oklahoma Air Emissions Inventory
If you need further help or have a question that cannot be answered by the information available here, then please contact the Emissions Inventory Section.
Frequently Asked Questions (FAQs)
Subchapter 5 of OAC 252:100 directly governs the submission of Emissions Inventories. For any question or in any situation, the Air Quality Rules always apply.
The following are guidance documents for the SLEIS online reporting tool. Additional information will be available inside SLEIS.
Click on the blue links.
- AP-42 – AP-42 refers to the EPA’s Compilation of Air Pollutant Emission Factors, a series of representative values that attempt to relate the quantity of a pollutant released to the atmosphere from a particular activity.
- CHIEF – EPA’s Clearinghouse for Inventories & Emissions Factors (CHIEF) is an excellent resource for all aspects of emissions inventories.
- WebFIRE – WebFire is EPA’s online emissions factor repository, retrieval, and development tool. The WebFIRE database contains EPA’s recommended emissions factors for criteria and hazardous air pollutants (HAP) for industrial and non-industrial processes.
- Source Classification Codes (SCCs) – Searchable database to find which SCC represents an emissions process or activity. EPA uses SCCs in databases such as WebFIRE and the National Emissions Inventory (NEI).
- NAICS / SICS – This page includes searchable lists for North American Industrial Classification System (NAICS), Standard Industry Classification (SIC) codes, and crosswalks between NAICS and SIC.
- SIC – Use this page to determine a Standard Industrial Classification code for a facility
Regulated Air Pollutants (RAPs) – This web page details all pollutants currently regulated in Oklahoma by State or Federal rule or regulation. Emissions of any of these pollutants must be reported as part of an emissions inventory, not just of pollutants that are specifically limited in a facility’s permit.