1. How Tribes Use Models Part 1 Navajo Nation Environmental Protection Agency

2. Tribes Air Quality Planning New Source Review Environmental Assessments Compliance Tracking

3. Air Quality Planning FIP/SIP/TIP CAA Rulemaking NAAQS Regional Haze

4. New Source Review Emission Limits Operating Condition Control Technology (BACT, RACT, MACT) Tribal Minor Source (TNSR) Prevention of Significant Deterioration (“PSD”) Non- Attainment Minor Source (“NA NSR”)

5. Lease Renewal Major Source Siting New Source Class 1 Areas Air Shed Protection Environmental Assessments Emission Inventory Existing Sources Impacts Validation of Air Quality Monitors Siting Air Monitors Compliance Tracking

6. Navajo Nation Case Study Environmental Impact Statement – Four Corners Power Plant & Navajo Mine – Navajo GS & Peabody Mine PSD Permits – Desert Rock, Navajo GS, Four Corners Best Available Retrofit Technology (“BART”) – NGS, FCPP Tribal Minor New Source Review

7. Four Corners Power Plant and Navajo Mine Energy Project Power Plant Lease Amendment Energy Transmission Lines Coal Mine Area

10. Air Quality Modeling Class II / Criteria Pollutant Modeling – Impacts from FCPP and Navajo Mine – Met data/ Ambient Background – Nearby Sources/Fenceline/Boundary Class II Plume Visibility Modeling Class 1 Modeling ( “BART”) and Acid Deposition EIS Section 7/ESA Ozone Modeling AERMOD, PLUVUE II, CALPUFF, CAMx