Bill > HR161

This bill, the New Source Review Permitting Improvement Act, aims to clarify what constitutes a "modification" or "construction" under the Clean Air Act, which are key terms for determining when a facility needs a permit to make changes. Specifically, it defines a modification as a change that increases the maximum hourly emission rate of a pollutant, but it excludes changes made to reduce pollution per unit of production or to improve operational reliability or safety, unless these changes also increase the maximum hourly emission rate and would negatively impact health or the environment. The bill also clarifies that "construction" for permitting purposes primarily refers to the physical building of discrete parts of an emissions unit, even if other significant on-site activities are involved. It further specifies that for areas with poor air quality (nonattainment areas), a modification is not considered a "significant emissions increase" if it doesn't lead to a substantial rise in annual actual emissions. Finally, a rule of construction is included to ensure these changes are interpreted consistently with how they were understood before the bill's enactment.