the Draft Guidance for PM2.5 Permit Modeling for public review and comment through April 17,

15 2013, with the intent of issuing final guidance by July 31, 2013.

16 Prospective permit applicants should recognize the importance of the consultation

17 process with the appropriate permit reviewing authority. This process will help identify the most

18 appropriate analytical techniques to be used for conducting a PM2.5 NAAQS and increment

19 compliance demonstration, including addressing the impacts of individual sources on secondary

20 PM2.5 formation, pursuant to Section 5.2.2.1.c of Appendix W.

21 In addition to this guidance, other recently issued EPA guidance of relevance for

22 consideration in permit modeling for PM2.5 includes:

“Model Clearinghouse Review of Modeling 1 Procedures for Demonstrating

2 Compliance with PM2.5 NAAQS” February 26, 2010 (U.S. EPA, 2010a);

3 “Modeling Procedures for Demonstrating Compliance with PM2.5 NAAQS” March

4 23, 2010 (U.S. EPA, 2010b); and

5 “Transportation Conformity Guidance for Quantitative Hot-spot Analyses in PM2.5

6 and PM10 Nonattainment and Maintenance Areas” December 2010 (U.S.EPA,

7 2010c).

 

 

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