Notice of Application for State Air Quality Permit AQ0923MSS12 and AQ0923TVP03 Rev 1, Hilcorp Alaska, LLC, Nikaitchuq Development

The Alaska Department of Environmental Conservation (ADEC) has made a preliminary decision to approve Hilcorp Alaska, LLC’s application for Air Quality Control Minor Permit AQ0923MSS12 for the Nikaitchuq Development. Additionally, ADEC proposes to issue a significant revision to Air Quality Control Operating Permit AQ0923TVP03 using the integrated review procedures described in 18 AAC 50.326(c)(1). Applicant : Hilcorp Alaska, LLC Permittee Address : 3800 Centerpoint Drive, Suite 1400, Anchorage, AK 99503 Location: Latitude 70º 30´ 36.87" North; Longitude 149º 52´ 0.65" West North Slope, Alaska Application: Hilcorp Alaska, LLC applied for a minor permit under 18 AAC 50.508(6) to revise or rescind Title I permit conditions. Additionally, Hilcorp Alaska, LLC applied for a revision to Title V operating permit. This public notice is for the draft operating permit and preliminary minor permit. Activity: The Nikaitchuq Development is an oil and gas production facility with three geographic sites located on Alaska’s North Slope. Emissions: The potential annual emissions of regulated air pollutants at the stationary source will not exceed: 225.0 tons of nitrogen oxides, 225.0 tons of carbon monoxide, 24.0 tons of particulate matter, 61.5 tons of sulfur dioxide, 91.1 tons of volatile organic compounds, 290,130 tons of carbon dioxide equivalent emissions, and 3.8 tons of Hazardous Air Pollutants (HAP). The total annual potential emissions of regulated air pollutants, other than greenhouse gases, are 626.6 tons. ADEC Preliminary Review: Based on review of the application, ADEC drafted a preliminary permit decision for the Nikaitchuq Development under AS 46.14 and 18 AAC 50. Available Information: Copies of the permit applications, ADEC’s preliminary minor permit, technical analysis report (TAR), draft operating permit, and statement of basis (SOB) 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 and draft operating permit may be submitted electronically via ADEC’s public notice site at https://dec.alaska.gov/Applications/Air/airtoolsweb/FormalComments , or to Ibnul Hasan by mail to 555 Cordova Street, Anchorage, AK 99501, or by email to ibnul.hasan@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 07, 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 8/7/2026 3:00:11 PM by jfrintala Modified 8/7/2026 3:11:31 PM by jfrintala

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  kristin.mabry@alaska.gov