SIP Proposal: Virginia (amendment to include a newly designated sulfur dioxide nonattainment area). 

SIP Proposal: Pennsylvania (disapproval of revisions to address certain reasonably available control technology requirements for the 1997 and 2008 ozone NAAQS for the Keystone, Conemaugh and Homer City electric generating facilities). 

EPA proposed to approve a request from the New Jersey Department of Environmental Protection for the delegation of authority to implement and enforce the federal plan requirements for municipal solid waste landfills that commenced construction on or before July 17, 2014. 

United States v. Apache Corp., No. 24-cv-00149 (D.N.M. Feb. 13, 2024). Under a proposed consent decree, a settling CAA defendant whose oil and natural gas production facilities in New Mexico and Texas allegedly failed to comply with requirements of the federal new source performance standards must pay a civil penalty of $4,000,000 and perform a project that will offset the excess emissions resulting from the violations. 

SIP Proposal: Iowa (updates to incorporations by reference to methods for performance testing, updates to definitions, and adoption of the most recent ozone NAAQS). 

SIP Approval: Missouri (incorporation by reference of emission guidelines for municipal solid waste landfills). 

EPA proposed to partially disapprove and partially approve SIP submissions from Arizona, Iowa, Kansas, New Mexico, and Tennessee regarding interstate transport for the 2015 eight-hour ozone NAAQS, and proposed a federal implementation plan for these states to address their obligations to eliminate significant contribution to nonattainment, or interference with maintenance, of the 2015 ozone NAAQS in other states. 

EPA seeks comment on its proposal to update fine particulate matter (PM) data from T640/T640X PM mass monitors. 

EPA made corrections and clarifications to the new source performance standards for electric arc furnaces and argon-oxygen decarburization vessels in the steel industry. 

EPA announced its intent to redesignate portions of Westmoreland County and Cambria County, Pennsylvania, to “nonattainment” for the 2010 sulfur dioxide NAAQS.