1. Fine Particulate Matter SIP for Washington DC Special Stakeholder Meeting February 20, 2008

2. Discussion Topics Background Air Quality Trends SIP Content Modeling Results Local Emissions Trends Conclusions

3. PM 2.5 SIP Background Standards - 15 µg/m 3 (annual) & 65 µg/m 3 (daily) DC area designated nonattainment in 2004 All NOVA monitors in compliance Influence on DC cited for inclusion Monitored air quality continues to improve SIP process began - Spring 2007 Draft SIP completed – Dec 2007 Public review/comment – Jan 2008

4. Air Quality – Annual Standard 13.9

5. Air Quality – New Daily Standard 34

6. SIP Content & Results Combination emission reduction measures Local point, mobile, & nonroad reductions Significant regional reductions of SO 2 & NO X Attainment demonstrated by 2009 using regional modeling Results consist with other modeling efforts All other SIP requirements met RACM analysis Conformity budgets Contingency measures

7. Baseline Attainment Status Annual Standard Attainment Nonattainment

8. Current & Future Status Annual Standard Attainment Nonattainment

9. Current Attainment Status 2006 Daily Standard Attainment Nonattainment

10. Future Predicted Status 2006 Daily Standard Attainment Nonattainment

11. Mirant PRGS Emission Trends

12. Local Emissions Reductions NOVA Point Sources SO 2 : - 32,935 TPY NO X : - 8,749 TPY

13. Conclusions DC area has a more than adequate monitoring network Entire area currently monitoring attainment with annual standard No EPA defined “hotspots” exist Model predicted attainment of all standards by 2009 Complete & fully approvable SIP

14. Local Area Analysis (LAA) Perceived local “hotspot” at PRGS Onsite monitoring underway No monitored evidence of hotspot exists LAA not required by EPA guidance Comprehensive permit for PRGS in process Bottom line – permit the appropriate mechanism to resolve any local issues

15. Mirant PRGS Monitoring PM 2.5 FRM PM 2.5 Continuous PM 2.5 EBAM Two SO 2 Monitors Results to date consistent with attainment (2007) Annual: 13.5 Daily: 32