Through CDM’s working library of more than 50 U.S. Environmental Protection Agency-approved models, CDM helps clients evaluate emissions and air pollution control options by effectively tailoring regulatory models to specific facility needs. The models available to CDM experts cover a wide span of applications, such as dispersion; deposition; specialized process emissions models; emergency releases; emissions and dispersion from aircraft, roadway, and intersection traffic; and regional air pollutant transport. Applying our industry-leading knowledge in geographic information system (GIS) software, CDM links GIS with computer model results to present, visualize, and graphically compare results for many scenarios.