The Alaska Department of Environmental Conservation (ADEC) is required to report emissions data to the National Emissions Inventory (NEI) in accordance with the United States Environmental Protection Agency (EPA) federal regulations 40 C.F.R. 51, Subpart A; Alaska State Statutes (AS) AS 46.03 and AS 46.14; and Alaska Administrative Code (AAC) 18 AAC 50 (18 AAC 50.200, 50.275, and 50.346).

ADEC, through these various regulations, can request information regarding the nature and amount of emissions from a permitted stationary source, as well as other information designated by the Department.

Purpose:

Collected emission inventory data is used to form the basis for air quality planning and monitoring that occurs at local, state, and national levels. This includes developing planning tools, measuring progress in reducing emissions; tracking air quality trends, and providing input for state air quality Management Programs.

Reporting and Submittal Requirements:

General information required for submittal include but are not limited to the following:

• Owner/Operator, Facility Name, Mailing Address, Physical Location, Contact Information
• Actual emissions
• Operational status, hours per year, and percent throughput
• Emission unit stack parameters
• Annual process or fuel combustion rates and fuel characteristics

Federal Reporting Requirements Table

Emissions are reported annually, or every three (3) years referred to as the triennial emissions inventory, based on the amount of pollutants emitted. Annual and Triennial Reporting is required for point sources that meet or exceed the following thresholds/volumes of pollutants as defined in 40 C.F.R. 51 Appendix A Table 1 of Subpart A

• Federal Reporting Requirements Table

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MAJOR, Title V, Type A and B Sources: (Potential to Emit more than 100 Tons Per Year)

Industrial (Type A, or Type B), point/stationary sources permitted under a Title V permit, submit emission inventories as required under Standard Permit Condition XV through the ADEC AOS system.

These sources are typically non-mobile and have an identifiable source of emissions that release pollutants to the atmosphere, and include such things as refineries, electric utility plants, and other industrial sites.

NONATTAINMENT Area(s) Permitted Sources:

Emission reporting threshold requirements are defined in 40 C.F.R. 51 Appendix A Table 1 of Subpart A. At present, Alaska has one nonattainment area; the Fairbanks North Star Nonattainment PM2.5 Area

MINOR Permitted Sources: (Other than Type A or Type B)

Minor permitted sources are small-scale industrial and commercial sources that have a potential to emit less than 100 tons per year (tpy) and include emissions from sites and processes that do not meet the reporting requirements for Type A or B point sources. EPA Appendix Table

Typically, these sources are too small, numerous, or difficult to inventory individually, and are reported by DEC on a triennial bases as area-wide emissions allocated to each Borough or Census area.

This category of stationary sources has not been inventoried as a specific point source by a permit holder in the past. In prior inventory years, DEC calculated these emissions based on fuel use and PTEs which resulted in estimated emissions instead of actual emissions. ADEC is required to calculate and report these emissions to EPA per 40 CFR 51.1, 51.15, and 40 CFR 51.20(d). For the Triennial NEI years, per 18 AAC 50.200 and 50.275 DEC is requesting permittees of these minor sources to collect and submit emissions. With these changes, DEC anticipates emission results will be more accurate, save state resources, and limit potential impacts of future emissions fee adjustments.

Minor Permitted Sources include but are not limited to:

• Emission units (generally include Boilers and RICE engines).
• Light industrial/commercial source (small mining/oil and gas operations, seafood processing, electrical generation, asphalt plants, rock crushers, incinerators, soil remediation, etc.).
• Stationary source fuel combustion.
• Product storage and transport distribution (Gas bulk storage, Bulk fuel storage).
• Waste Management (landfills).
• Solvent Use (small surface coating operations).

Emissions Inventory data for this category can be submitted using Airreports or mail system. On-line submittal through AOS is under development.

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MOBILE Sources:

Mobile sources include motor (on-road and non-road) vehicles; and non-road engines.

More information is available through the Mobile Sources section of the Non-Point Emission Inventories web page link.

Staff Contacts:

Contact for Permitted Sources

• Kolena Momberger
• Phone: 907-269-7524

General Emission Inventory Questions:

• Morgan Frank
• Phone: 907-269-4913

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