The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the State of Delaware. This revision pertains to the reduction of volatile organic compounds (VOC) emissions from cold solvent cleaning operations. This action is being taken under the Clean Air Act (CAA).

The Clean Air Act (CAA) requires each state implementation plan (SIP) to contain adequate provisions prohibiting emissions that will significantly contribute to nonattainment or interfere with maintenance of air quality in other states. The State of Arizona submitted a SIP revision to the Environmental Protection Agency (EPA) to address these requirements for the 2015 ozone national ambient air quality standards (NAAQS).

The Environmental Protection Agency (EPA) is finalizing approval of a North Carolina State Implementation Plan (SIP) revision, submitted through a letter dated April 13, 2021. The SIP revision includes changes to North Carolina's SIP-approved rule addressing best available retrofit technology (BART) for regional haze. EPA is approving North Carolina's SIP revision because the changes are consistent with Clean Air Act (CAA or Act) requirements.

The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision, made in two separate submittals, by the State of Delaware. This revision removes requirements for gasoline vapor recovery systems installed on gasoline dispensers, the purpose of which are to capture emissions from vehicle refueling operations, otherwise known as Stage II vapor recovery. This revision also strengthens Delaware's requirements for gasoline vapor recovery systems that capture emissions from storage tank refueling operations, otherwise known as Stage I vapor recovery.