The user interface provides a robust, user-friendly, GIS-driven project setup and project management environment. The modern Microsoft 'Ribbon' style interface in combination with the unique toolbars, user-managed data trees, and selection-specific properties grids enables users to easily manage all project inputs, analyses, and results. Users can import, manage, and define every facet of the analysis prior to the modeling run or after model execution using powerful results analysis and reporting tools. Analyze individual emission sources, source groups, chemicals, chemical groups, exposure scenarios, and exposure scenario locations or simultaneously analyze thousands of source, chemicals, scenario, and location-combinations. These powerful features provide transparent modeling results and error logging options to users for total command and control of equation inputs, intermediate calculations, and final results.