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89 FR 54753

SIP Proposal: California (motor vehicle inspection and maintenance program requirements for the 2015 eight-hour ozone NAAQS).

89 FR 54748

SIP Proposal: California (revisions concerning nitrogen oxide (NOx) emissions from boilers, gas turbines, and miscellaneous combustion units, and reasonably available control technology requirements for major source of NOx in the Sacramento Metro ozone nonattainment area).

89 FR 54362

SIP Approval: Iowa (recent changes to Linn County ordinances).

89 FR 54358

SIP Approval: Utah (revisions to air quality rules).

89 FR 54396

SIP Proposal: New Jersey (interstate transport requirements for the 2010 one-hour sulfur dioxide primary NAAQS).

Ohio v. Environmental Protection Agency

The U.S. Supreme Court, 5-4, granted three states' and several industry groups' applications to stay enforcement of EPA's 2023 rule issuing a federal implementation plan (FIP) for 23 states whose SIPs the Agency determined had failed to adequately address new air quality standards for ozone levels u...

89 FR 53932

SIP Proposal: Pennsylvania (revisions establishing reasonably available control technology requirements for the 2008 and 2015 ozone NAAQS for each category of volatile organic compound sources covered by EPA’s 2016 control techniques guidelines for the oil and gas industry). 

89 FR 53496

EPA approved the Tennessee Department of Environment and Conservation’s request to update the method of delegations and continue the delegations of authority to implement and enforce NESHAPs and NESHAPs for source categories. 

89 FR 52425

EPA proposed amendments to several new source performance standards and NESHAPs under the CAA; the amendments would remove the affirmative defense provisions associated with violation of emission standards due to malfunctions.

89 FR 52413

SIP Proposal: Indiana (revision to monitoring and compliance requirements for certain process heater stacks at Safety-Kleen Oil Recovery Company in Lake County).