Alaska Online Public Notices #AK0038661

This opportunity involves the proposed issuance of an Alaska Pollutant Discharge Elimination System (APDES) permit for Hilcorp Alaska LLC's Endicott Operations: - Government Buyer: - Alaska Department of Environmental Conservation (DEC), Division of Water – Wastewater Discharge Authorization Program - OEMs and Vendors: - Hilcorp Alaska LLC (applicant and operator) - Products/Services Requested: - Wastewater discharge authorization and environmental compliance services for oil production operations - Permit covers discharge of treated water and domestic wastewater from multiple outfalls: - Outfall 001A (combined Outfalls 002A and 002B) - Outfall 002A (seawater treatment plant and potable water treatment backwash) - Outfall 002B (domestic wastewater) - Outfall 003A (continuous flush system) - Unique or Notable Requirements: - Authorization for chronic mixing zones (temperature, total residual chlorine, pH, chronic whole effluent toxicity) - Acute mixing zone for total residual chlorine - No mixing zone for Outfall 003A - Public review and comment period prior to final permit issuance - Place of Performance: - Endicott Operations, Duck Island, Stefansson Sound, Beaufort Sea, Alaska - Only Hilcorp Alaska LLC is mentioned as the OEM/vendor

The Alaska Department of Environmental Conservation (DEC) has prepared a draft Alaska Pollutant Discharge Elimination System (APDES) individual permit for Hilcorp Alaska LLC's Endicott Operations located on Duck Island in Stefansson Sound, Beaufort Sea, Alaska. The permit authorizes discharges from multiple outfalls including combined outfalls for seawater treatment plant and domestic wastewater, with specific mixing zones for temperature, chlorine, pH, and toxicity. The draft permit is open for a 30-day public review period ending April 24, 2026, during which written comments or requests for a public hearing may be submitted. DEC will consider all comments before issuing a final permit.