State Implementation Plan (SIP) Attainment Demonstration Guidance
The EPA’s Air Quality Modeling Group (AQMG) provides guidance documents to EPA Regional, State, and Tribal air quality management authorities and the general public on how to prepare attainment demonstrations for National Ambient Air Quality Standards (NAAQS) and the Regional Haze Rule using air quality modeling and other relevant technical analyses. These guidance documents are primarily directed at modeling applications in nonattainment areas but are also useful for modeling in maintenance areas or to support other rules or sections of the Clean Air Act. These guidance documents recommend procedures for estimating if a control strategy to reduce pollutant emissions (e.g., ozone precursors) will lead to attainment of the appropriate NAAQS. They also describe how to apply air quality models to generate the predictions later used to see if attainment is shown. This section of guidance is divided into three components: 8-hour Ozone/Particulate Matter (PM2.5)/Regional Haze Guidance, PM10 Guidance, and Carbon Monoxide Guidance.
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|8-hour Ozone/PM2.5/Regional Haze Modeling Guidance|
|Draft Modeling Guidance for Demonstrating Attainment of Air Quality Goals for Ozone, PM2.5, and Regional Haze (PDF)(214 pp, 3.25 M) - December 2014 - Draft version of the updated Ozone, PM2.5, and Regional Haze modeling guidance document.
Guidance on the Use of Models and Other Analyses for Demonstrating Attainment of Air Quality Goals for Ozone, PM2.5, and Regional Haze (PDF)(262 pp, 1 M) - April 2007 - Final version of the Ozone, PM2.5, and Regional Haze modeling guidance document.
Update to the 24 Hour PM2.5 NAAQS Modeled Attainment Test (PDF)(8 pp, 385 K) - Updated version of the 24-hour PM2.5 attainment test. This new version replaces section 5.2 of the 2007 PM2.5 modeling guidance (PDF)(262 pp, 1 M).
The Modeled Attainment Test Software (MATS) Tool is now available.
|Fugitive Dust Guidelines (ZIP)(692 K) - Guidance for modeling fugitive dust: Phase I, II & III, December 9, 1996|
|Carbon Monoxide Guidance|
|Guideline for Modeling Carbon Monoxide from Roadway Intersections (PDF)(64 pp, 532 K) - Applicable for roadway intersections, July 19, 1993|