United States v. Enterprise Gas Processing, LLC, No. 1:24-cv-1878 (D. Colo. July 8, 2024). Under a proposed consent decree, settling CAA defendants must perform injunctive relief and pay a $1,000,000 civil penalty for alleged failures to monitor and repair leaking equipment at a natural gas processing plant in Colorado.

SIP Proposal: California (emissions statement requirements for the 2015 ozone NAAQS). 

SIP Proposal: Minnesota (regional haze plan for second implementation period). 

SIP Proposal: New Hampshire (ambient air quality standards revisions). 

SIP Proposal: New Jersey (revisions to address requirements for emission statement program, ozone nonattainment new source review program, nonattainment emission inventory, and clean fuels for fleets; reasonable further progress plans and associated motor vehicle emission budgets for both moderate and serious classifications of the 2008 ozone NAAQS).

EPA made an interim final determination to stay application of the offset sanction and defer application of the highway sanction associated with its August 16, 2022, disapproval of certain reasonably available control technology requirements for the 1997 and 2008 ozone NAAQS for Pennsylvania.

SIP Proposal: Pennsylvania (nitrogen oxides emission limits and requirements for coal-fired electric generating units equipped with selective catalytic reduction at Keystone, Conemaugh, Homer City, and Montour facilities).

SIP Proposal: North Dakota (partial approval and partial disapproval of regional haze plan for second implementation period).

United States v. Enbridge Energy, LP, No. 1:16-cv-914 (W.D. Mich. June 29, 2024). A proposed eighth modification to a consent decree concerning two separate oil spills in Michigan and Illinois in 2010 would require settling CWA and OPA defendants to investigate circumferential crack features in four pipelines; revise the methods used for assessing whether a circumferential crack must be excavated and repaired; adjust certain requirements relating to repair and mitigation of circumferential crack features; eliminate two requirements relating to circumferential cracks; and enable defendants to seek early termination of certain requirements relating to circumferential crack features.

SIP Approval: Wisconsin (second 10-year 2006 24-hour fine particulate matter limited maintenance plan).