EPA entered into a proposed consent decree in Sierra Club v. Regan, No. 1:23-cv-00424-RCL (D.D.C.), concerning the Agency’s alleged failure to issue final federal plans implementing emissions guidelines for commercial and industrial solid waste incinerators and other solid waste incinerators in states that had not submitted approvable state plans that constituted unreasonably delayed agency action. 

SIP Approval: Nevada (second ten-year plan for maintaining the 1997 eight-hour ozone NAAQS in Clark County). 

EPA finalized the residual risk and technology review conducted for the Commercial Sterilization Facilities source category regulated under NESHAPs; took final action to correct and clarify regulatory provisions related to emissions during periods of startup, shutdown, and malfunction; and took final action to require owners and operators to demonstrate compliance through ethylene oxide continuous emissions monitoring systems. 

United States v. Kyocera AVX Components Corp., No. 1:24-cv-305 (W.D.N.Y.  Apr. 1, 2024). Under a proposed consent decree, a settling CERCLA defendant must perform remedial action at the Olean Wellfield Superfund Site in the City of Olean, the Town of Olean, and the Town of Portville, New York, and reimburse EPA for its past and future costs regarding the remedial action.

EPA gave notice that it has responded to petitions for reconsideration and administrative stay of a final action under the “good neighbor” or “interstate transport” provision of the CAA published in the Federal Register on June 5, 2023, titled "Federal 'Good Neighbor Plan' for the 2015 Ozone National Ambient Air Quality Standards." 

SIP Approval: Pennsylvania (revisions to particulate matter emission mitigation requirements for industry operating in the portion of Allegheny County known as the “Mon Valley” during weather-related pollution episodes, and revisions to open burning regulation in Allegheny County). 

SIP Approval: Arizona (revisions concerning definitions for the Maricopa County Air Quality Department). 

EPA finalized proposed amendments to remove the force majeure exemption for pressure relief devices and emergency flaring, incorporate clarifications for the degassing requirements for floating roof storage vessels, and address other corrections and clarifications for various NESHAPs. 

SIP Approval: Arizona (stationary source permits). 

EPA finalized amendments to NESHAPs for integrated iron and steel manufacturing facilities.