Pittsburgh, PA and Washington, DC
Environmental Alert
(by Gary Steinbauer and Gina Buchman)
On May 31, 2025, the Pennsylvania Department of Environmental Protection (PADEP) published notice of opportunity for public comment on its Proposed State Plan for 40 CFR Part 60, Subpart OOOOc Emissions Guidelines for Greenhouse Gas Emissions from Existing Crude Oil and Natural Gas Facilities in the Pennsylvania Bulletin. 55 Pa.B. 3810.
PADEP is obligated to undertake this rulemaking pursuant to section 111(d) of the Clean Air Act and its implementing regulations, which require states to establish, implement, and enforce standards of performance for existing sources of a pollutant for which emission guidelines have been issued the United States Environmental Protection Agency (EPA). In March 2024, EPA published Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review. 89 Fed. Reg. 16820 (Mar. 8, 2024). This rule, referred to by some as the “Methane Rule,” established new New Source Performance Standards regulating greenhouse gases (GHGs) and volatile organic compounds (VOCs) emissions for the Crude Oil and Natural Gas source category that begin construction, reconstruction, or modification after December 6, 2022 (referred to as OOOOb) and emission guidelines for states to use in developing, submitting, and implementing state plans to establish standards of performance to limit GHG emissions (in the form of methane) from sources existing as of December 6, 2022 in the Crude Oil and Natural Gas source category (referred to as OOOOc). OOOOb and OOOOc are very similar as it relates to methane reduction. States, industry trade groups, and oil and gas companies have challenged the Methane Rule, and these challenges are pending before the D.C. …