The Draft Guidance for PM2.5 Permit Modeling is broken down into five primary

12 sections:

13 I. Background – A historical narrative of the relevant regulatory actions to this draft

14 guidance document starting with the promulgation of the initial PM2.5 NAAQSs in

15 1997; chronicling the period of time that the PM10 Surrogate Policy was relied upon

16 for demonstrating compliance with the PM2.5 NAAQS; and arriving at the present

17 with the need for an assessment of both the primary and secondary PM2.5 impacts, as

18 appropriate, of a new or modifying source for demonstrating compliance with PM2.5

19 NAAQS and increment.

20 II. Guidance Overview – A general overview of the steps that an applicant would

21 routinely take under the PSD program for demonstrating compliance with the PM2.5

22 NAAQS and increment. The concepts of significant emissions rates (SER) and

 

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