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This website, provided by the EPA Office of Enforcement, is a collection of current, active EPA policies and guidance in relation to CAA, including: stationary sources; New Source Performance Standards (NSPS); National Emissions Standards for Hazardous Air Pollutants (NESHAPs); CAA Section 114 : Inspection, Entry and Monitoring; new source review (NSR); prevention of significant deterioration (PSD); mobile sources; and acid rain.

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Last Updated: July 31, 2017