The Definitive Guide toAI Data Centers
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GuideGlossaryPSD

PSD · Prevention of Significant Deterioration

The permitting path a major new emitting source triggers in an attainment area, requiring best-available control technology and dispersion modeling — a year-plus schedule item.

Current numbers

~60 days-1 year+; case-specificair-permit lead time: minor-source 6-12 mo vs PSD/nonattainment NSR 18-36+ mo for combustion bridge poweras of 2026-08-24 · register ↗

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