Notice of Application for State Air Quality Permit AQ1564MSS04, Oil Search Alaska, LLC, a Subsidiary of Santos Limited, Nanushuk Drillsite B

This public notice announces ADEC’s preliminary decision to approve a State Air Quality Minor Permit (AQ1564MSS04) for Oil Search (Alaska) LLC’s Nanushuk Drillsite B project. The permit revises terms of an existing Title I permit and covers construction, operation, or relocation of a rock crusher (≥5 tons/hr) and a portable oil‑and‑gas operation. The agency has quantified reductions in annual emissions (NOx, CO, PM, SO₂, VOCs) and invites public comment on the preliminary decision. Comments must be submitted electronically or by mail by 11:59 p.m. AK time on October 16, 2026. The notice provides contact information for submitting comments and for ADA accommodations. • Permit ID: AQ1564MSS04 • Applicant: Oil Search (Alaska) LLC (subsidiary of Santos Ltd.) • Location: Nanushuk Drillsite B (70° 20′ 6.938″ N, 150° 38′ 0.184″ W) • Scope: Revision of Title I permit; rock‑crusher and portable oil‑gas operations • Emissions impact: Net reductions of 27.3 t NOx, 30.15 t CO, 4.95 t PM, 32.08 t SO₂, 54.25 t VOCs; total 255.72 t of regulated pollutants per year • Public comment period: 30 days from 9/16/2026, deadline 10/16/2026 • Submission methods: online form, mail to PO Box 111800 (Juneau), email to [email protected] or [email protected] • Primary contact for comments: Joshua Klina