The Environmental Protection Agency (EPA) is finalizing a program to further reduce air pollution, including ozone and particulate matter (PM), from heavy-duty engines and vehicles across the United States. The final program includes new emission standards that are significantly more stringent and that cover a wider range of heavy-duty engine operating conditions compared to today's standards; further, the final program requires these more stringent emissions standards to be met for a longer period of when these engines operate on the road.

In this final action, the Environmental Protection Agency (EPA) is amending its reformulated gasoline (RFG) regulations to reflect that York, Cumberland, Androscoggin, Sagadahoc, Kennebec, Knox and Lincoln counties in Maine (the Southern Maine Area) are no longer Federal RFG covered areas as of September 30, 2021. EPA previously approved a petition from Maine to opt out of the Federal RFG program and removed the requirement to sell Federal RFG in the Southern Maine Area as of September 30, 2021.

Pursuant to the Resource Conservation and Recovery Act (RCRA or Act), the Environmental Protection Agency (EPA) is taking direct final action to approve revisions to the State of Kansas's Underground Storage Tank (UST) program submitted by the Kansas Department of Health and Environment (KDHE). This action also codifies EPA's approval of Kansas's State program and incorporates by reference those provisions of the State regulations that we have determined meet the requirements for approval.