NMFS announced its intent to conduct a five-year review of the endangered western distinct population segment of the Steller sea lion. 

United States v. Colonial Oil Industries, Inc., No. 4:24-cv-00069-RSB-CLR (S.D. Ga. Apr. 10, 2024). Under a proposed consent decree, a settling CAA defendant that allegedly failed to meet renewable fuel volume obligations for fuel it supplied to certain marine vessels and produced and sold gasoline that exceeded the applicable volatility standard must purchase and retire over 9 million renewable identification number credits, estimated to cost approximately $12.2 million, and pay a civil penalty of approximately $2.8 million.  

SIP Proposal: California (revisions to meet requirements for the 1997 eight-hour ozone NAAQS in the Riverside County nonattainment area). 

SIP Proposal: Arizona (revisions concerning emissions of volatile organic compounds, nitrogen oxides, particulate matter, and sulfur oxides for the Maricopa County Air Quality Department).  

EPA proposed to revise the existing secondary sulfur dioxide NAAQS, to retain the existing secondary standards for nitrogen oxides and particulate matter, and to revise the data handling requirements for the proposed secondary sulfur oxide NAAQS.