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PM 2.5 New Source Review

This document summarizes the PM2.5 New Source Review (NSR) guidance presented at the Southeastern Permitting Workshop in Tampa, Florida, on May 11, 2007. It outlines the regulatory status of PM2.5 as a NSR pollutant, the proposed implementation rules issued in November 2005, and the reliance on PM10 as a surrogate. The significant emissions rates for PM2.5 and its precursors such as SO2, NOx, and VOC are detailed, as well as expectations for final rules and separate proposed regulations for monitoring and impact levels scheduled for Fall 2007.

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PM 2.5 New Source Review

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  1. PM2.5 New Source Review 2007 Southeastern Permitting Workshop Tampa, Florida May 11, 2007 – Morning Session

  2. Current PM2.5 NSR Guidance • PM2.5 is a regulated NSR pollutant. • Proposed PM2.5 NSR implementation rules issued November 1, 2005. • By memos issued in October 1997 and April 2005, EPA recommended use of PM10 as a surrogate for PM2.5 until PM2.5 NSR implementation rules become effective. • Title V permitting comment in recent non-NSR final PM2.5 implementation rules.

  3. Proposed PM2.5 NSR Implementation Rules • PM2.5 significant emissions rate = 10 tpy (direct emissions) • Precursors: • SO2 - mandatory nationwide • NOx - included unless State demonstrates otherwise • VOC - excluded unless State demonstrates otherwise • Ammonia - excluded unless State demonstrates otherwise • SO2 and NOx significant emissions rate = 40 tpy (same as in other NSR rules)

  4. Other Comments on PM2.5NSR Implementation • Final NSR implementation rules expected Fall 2007, not including components in next item. • Separate proposed rules to be issued for PM2.5 increments, significant impact levels, and significant monitoring concentrations. • Final rules and separate proposed rules planned for issuance on same day.

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