Guidance on CAA Section 182(f) NO_x Exemptions Made Available

摘要

Under CAA Section 182(f), states that have areas designated nonattainment for ozone must apply the same requirements to stationary sources of nitrogen oxides (NO_x) as are applied to sources of volatile organic compounds (VOCs). Generally, both NO_x and VOC emissions contribute to the formation of ground level ozone; thus, control of both is required in ozone nonattainment areas. However, in some cases, a local decrease in NO_x emissions can actually lead to an increase in ozone formation. CAA Section 182(f) accommodates such situations by allowing EPA to grant a "NO_x waiver" exempting areas from certain NO_x control requirements.