EPA approved a delegation request submitted by the Washington State Department of Health for full delegation of authority to implement and enforce NESHAPs for radionuclide air emissions. 

SIP Proposal: Tennessee (revisions to control of sulfur dioxide emissions).

EPA announced the availability of federally enforceable SIPs in each state.

EPA proposed to add per- and polyfluoroalkyl substances subject to reporting under EPCRA and the Pollution Prevention Act pursuant to the National Defense Authorization Act for Fiscal Year 2020 to the List of Lower Thresholds for Chemicals of Special Concern.

EPA proposed revisions to the federal CWA water quality standards regulation to clarify and prescribe how water quality standards must protect aquatic and aquatic-dependent resources reserved to tribes through treaties, statutes, executive orders, or other sources of federal law, where applicable.

SIP Proposal: Colorado (conditional approval of revisions addressing reasonably available control technology for sources covered by the 2008 miscellaneous metal and plastic parts coatings control techniques guidelines and major source nitrogen oxides for moderate nonattainment areas under the 2008 ozone NAAQS).

EPA determined that renewable diesel, jet fuel, heating oil, naphtha, and liquefied petroleum gas produced from canola/rapeseed oil via a hydrotreating process all meet the life-cycle greenhouse gas emissions reduction threshold of 50% required for advanced biofuels and biomass-based diesel under the Renewable Fuel Standard (RFS) program, added these pathways to the list of approved pathways in the RFS regulations, and added a new definition of “canola/rapeseed oil” to the RFS regulations.

FWS listed the Dixie Valley toad as an endangered species under the ESA and continued protections established under the Service's April 7, 2022, temporary emergency listing rule.

EPA clarified its NPDES Stormwater Phase II regulations due to recent changes made by the Census Bureau; changes are limited to clarifying that the designation criteria for small municipal separate storm sewer systems would remain the same.

EPA proposed to clarify its NPDES Stormwater Phase II regulations due to recent changes made by the Census Bureau; changes would be limited to clarifying that the designation criteria for small municipal separate storm sewer systems would remain the same.