Under the Clean Air Act, states are primarily responsible for attaining and maintaining the standards for those regions within their borders.They do this by formulating and submitting to EPA for its approval their State Implementation Plans (SIPs), which lay out their plans for reaching the standards, including controls imposed on individual sources of the pollutant in question.The new rule retains the same averaging time (eight-hour) and form (annual fourth-highest daily maximum, averaged over three years) as the existing standard.
Dissolved ozone is used as a sanitizing agent throughout the pharmaceutical industry.
Further SIP revisions may become necessary if and when one or more of a state’s air quality regions are reclassified as “nonattainment” with respect to the new, more stringent standards.
The lower ozone NAAQS standards will have a significant impact on the regulated community.
The rule takes effect 60 days after it appears in the Register, which for large and complex rules of this sort typically occurs several weeks or months after EPA releases the prepublication version.
If the revised standards require any changes in a state’s basic implementation programs, the state has three years to submit any necessary SIP revisions to EPA for federal approval.