On August 16, 2012, the EPA completed a risk and technology review (RTR) of the National Emission Standards for Hazardous Air Pollutants (NESHAP) that regulate hazardous air pollutants (HAP) from new and existing stationary sources in the oil and natural gas production and transmission/storage major source categories (the 2012 RTR) (77 FR 49490). The 2012 RTR amended the NESHAP (40 CFR part 63, subparts HH and HHH) promulgated in 1999 for these two oil and natural gas major source categories. The EPA received several petitions requesting that the Agency reconsider, clarify, and amend the risk review, the technology review, and certain provisions of the 2012 RTR. In this action, the EPA will address certain aspects of the 2012 RTR rule under reconsideration. In addition, the EPA will conduct a technology review, which is required every eight years under the Clean Air Act. Under a consent decree (California Communities Against Toxics et al. v. Regan, No. 1:22-cv-01012 (D.D.C. 2022)) signed and entered on April 17, 2023, the Administrator will sign a proposed rule by December 10, 2025, and a final rule by December 10, 2026.