Aviation Emissions and Air Quality Handbook  8.  Conformity ......................................................................................................................... 69 8.1.  General Conformity................................................................................................... 69 8.1.1.  Applicability Analysis ..................................................................................69 8.1.1.1. Nonattainment/Maintenance Status for the Purposes of General Conformity.................................................................................... 70 8.1.1.2. Conformity Exemptions................................................................ 70 8.1.1.3. Presumed to Conform ................................................................... 71 8.1.1.4. De minimis  Thresholds ................................................................. 71 8.1.1.5. Facility-Wide Emissions Budgets................................................. 74 8.1.2.  Preparing a General Conformity Determination...........................................74 8.1.2.1. Identifying Emissions in the SIP................................................... 75 8.1.2.2. Emissions Mitigation and Offsetting ............................................ 75 8.1.2.3. Air Quality Modeling for CO and PM.......................................... 76 8.1.2.4. Commitment to Revise the SIP..................................................... 76 8.1.3.  Interagency and Public Review ....................................................................76 8.1.4.  FAA Guidance ..............................................................................................77 8.2.  Transportation Conformity........................................................................................ 77 9.  Coordination Best Practices.............................................................................................. 78 9.1.  Scoping Process......................................................................................................... 78 9.2.  Air Quality Assessment Protocol .............................................................................. 78 9.3.  Coordination and Review Process............................................................................. 79 References .................................................................................................................................... 80 Glossary ....................................................................................................................................... 89 Acronyms and Abbreviations .................................................................................................... 98 List of Tables  Table 2-1.  National Ambient Air Quality Standards  Table 2-2.  Regulatory Agencies  Table 3-1.  EPA Criteria Air Pollutants  Table 3-2.  Sources of Air Emissions and Pollutants of Concern at Airports  Table 5-1.  Emissions Inventory and Dispersion Models  Table 6-1.  Criteria Pollutant Emissions Inventory Guidance Summary  Table 6-2.  Operational Emissions Inventory Results  Table 6-3.  Construction Emissions Inventory Results  Table 6-4.  Potential HAPs to be Included in an Airport Emissions Inventory  Table 6-5.  HAPs Emissions Inventory Results  v 