concentrations are displayed in the AEDT interface via maps of r eceptor sets and as tabular output. 

## 5.2. Emissions and Dispersion Modeling System 

EDMS was originally developed by the FAA in the mid -1980s as a complex source microcomputer model designed to assess the air quality impacts of proposed airport development projects. Since that time, EDMS has been revised and improved numerous times and is designed to assess the air quality impac ts of airport emission sources which consist of a ircraft, APUs, GSE, ground access vehicles , and stationary sources. EDMS is one of the few a ir quality assessment tools specifically engineered for the aviation community. 21 It includes the following: 

• Emissions inventory and dispersion modeling capabilities; 

• The latest aircraft engine emission factors from the International Civil Aviation Organization (ICAO) Engine Exhaust Emissions Data Bank; 

• Motor vehicle emission factors from the latest version of the EPA’s MOBILE6.2 22 and PART5 23 models (recently replaced with EPA’s MOVES model and rendering MOBILE6.2 and PART5 models obsolete); 

• GSE emission factors from the latest version of EPA’s NONROAD model; and 

• Emissions data for the EPA criteria pollutants and speciated organic gas emissions. 

In 1998, the FAA identified EDMS as the “required” model to perform air quality analyses for aviation sources. 24 This policy ensures the consistency and quality of aviation-related air quality analyses performed for the FAA. The current EDMS version is 5.1.4.1, released in August of 2013. (EDMS should be used until the release of AEDT 2b and subsequent AEDT updates.) 

## 5.3. MOVES 

MOVES is the new emission modeling system developed by EPA’s Office of Transportation and Air Quality (OTAQ) that computes emissions for mobile sources. 25 Currently MOVES provides emissions for on- road vehicles including cars, trucks, motorcycles, and buses and estimates exhaust and evaporative emissions as well as brake and tire wear emissions from all types of on - road vehicles for any part of the country, except California. 

EPA officially released the MOVES model (i.e., MOVES2010) in March 2010 which replaced the previous on-road MOBILE emissions model (i.e., MOBILE6.2). Presently, MOVES2014 is the latest version of MOVES and incorporates numerous new features and a number 

