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Timely Processing of Prevention of Significant Deterioration (PSD - epa

Timely Processing of Prevention of Significant Deterioration (PSD - epa 2025

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The memorandum from the United States Environmental Protection Agency outlines the expectations and responsibilities for processing Prevention of Significant Deterioration (PSD) permit applications. It emphasizes the importance of timely processing, setting a goal for final decisions within 10 months of application completeness. The document details procedural requirements under the Clean Air Act, best practices for regional offices, and guidance for delegated air agencies. It also discusses the significance of public involvement, environmental justice considerations, and compliance with other federal statutes. The memo serves as a non-binding guidance to ensure consistent and efficient permit processing.

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What is a PSD review?

PSD applies in attainment areas, which are areas where the air quality is classified as meeting the NAAQS. PSD review and permitting is intended to allow construction of new or modified sources of air pollution in these areas while protecting (i.e., not significantly degrading) air quality.

What is the purpose of the PSD?

PSD was established to reduce the emissions and impacts from a new source or modification at an existing source and, in attainment areas, ensure that such projects would not cause the surrounding air to violate the National Ambient Air Quality Standards (NAAQS).

What triggers PSD?

If the project emissions increase equals or exceeds the SER for the pollutant, PSD is triggered for that pollutant as well. Major source: If the net emissions increase for the pollutant equals or exceeds the SER (Tables 1-3).

What is the process of PSD?

The PSD sections of the Clean Air Act require a permit program for certain new or modified sources of air pollution. One primary purpose of the PSD process is to aid in the protection and enhancement of air quality in national wilderness areas and other locations of scenic, recreational, historic, or natural value.

What is the EPA prevention of significant deterioration?

Prevention of Significant Deterioration (PSD) applies to new major sources or major modifications at existing sources for pollutants where the area the source is located is in attainment or unclassifiable with the National Ambient Air Quality Standards (NAAQS).

What is the meaning of PSD?

.psd, a Photoshop document file extension.

What triggers a PSD permit?

The PSD permit is required for new major sources or major modifications at existing sources in attainment or unclassifiable areas. Its main purpose is to prevent significant deterioration of air quality by requiring the use of Best Available Control Technology (BACT) and conducting air quality analysis.

What is PSD signal processing?

A Power Spectral Density (PSD) is the measure of signals power content versus frequency. A PSD is typically used to characterize broadband random signals. The amplitude of the PSD is normalized by the spectral resolution employed to digitize the signal. For vibration data, a PSD has amplitude units of g2/Hz.

Timely Processing of Prevention of Significant Deterioration (PSD - epa 2025

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