Notice of Application for State Air Quality Permit AQ1859MSS01 Revision 1, ConocoPhillips Alaska, Inc., Willow Central Facility

The Alaska Department of Environmental Conservation (ADEC) has made a preliminary decision to approve ConocoPhillips Alaska, Inc’s application for Air Quality Control Minor Permit AQ1859MSS01 Revision 1 for the Willow Central Facility. Applicant: ConocoPhillips Alaska, Inc 700 G Street, Anchorage, Alaska 99501 Location: Latitude 70° 7’ 37.29” North; Longitude 152° 2’ 26.62” West Activity: ConocoPhillips Alaska, Inc applied for a minor permit revision under 18 AAC 50.508(5) for an Owner Requested Limit to avoid minor permit classification for a stationary source in the Bear Tooth Unit on the Alaskan North Slope. Emissions: The potential annual emissions of regulated air pollutants at the stationary source will not exceed: 179.16 tons of Nitrogen Oxides, 236.55 tons of Carbon Monoxide, 150.51 tons of Particulate Matter, 130.04 tons of Sulfur Dioxide, 149.61 tons of Volatile Organic Compounds, 579,097 tons of Carbon Dioxide Equivalent emissions, and 6.43 tons of Hazardous Air Pollutants (HAP), with highest individual HAP (Formaldehyde) estimated at 3.54 tons. The total annual potential emissions of regulated air pollutants, other than greenhouse gases, are 845.89 tons. ADEC Preliminary Review: Based on review of the application, ADEC drafted a preliminary permit decision for this project under AS 46.14 and 18 AAC 50. Available Information: Copies of the permit application(s), ADEC’s preliminary minor permit and technical analysis report (TAR) are available at the following offices: ADEC Air Permits Program, 410 Willoughby Avenue, Suite 303, Juneau, Alaska 99801 ADEC Air Permits Program, 555 Cordova Street, Anchorage, AK 99501 These documents are also available at ADEC’s website at: http://dec.alaska.gov/Applications/Air/airtoolsweb/AirPermitsApprovalsAndPublicNotices/ Opportunity for Public Participation: Any interested person may present written statements relevant to the preliminary decision within 30 days after the first publication date. ADEC will consider all comments received and make any changes ADEC finds beneficial or necessary to assure compliance with 18 AAC 50 or state law. ADEC will issue a final decision to issue or deny the permit after the close of the public comment period. ADEC complies with Title II of the Americans with Disabilities Act (ADA) of 1990. If you are a person with a disability who may need a special accommodation in order to participate in this public process, please contact ADA Coordinator Kristin Mabry, kristin.mabry@alaska.gov , 1-907-334-0884; Alaska Relay Service/TTY/TDD 1-800-770-8973; or dial 711 by the 15 th day of this public comment period to ensure that any necessary accommodations can be provided. Comments relevant to the preliminary minor permit may be submitted electronically via ADEC’s public notice site at https://dec.alaska.gov/Applications/Air/airtoolsweb/FormalComments , or to Zachary Boyden by mail to 555 Cordova Street, Anchorage, AK 99501, or by email to zachary.boyden@alaska.gov and dec.air.comment@alaska.gov . Comments must be received by close of public comments period at 11:59 p.m. Alaska time on September 21, 2026. Except for comments classified under AS 46.14.520, all public comments submitted during the public comment period can be viewed at https://dec.alaska.gov/Applications/Air/airtoolsweb/AirPermitsApprovalsAndPublicNotices after the public comment period. Attachments, History, Details Attachments None Revision History Created 8/20/2026 2:43:26 PM by jfrintala

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  kristin.mabry@alaska.gov