Environmental Consulting
Air Dispersion Modeling
For more than 40 years, Trinity Consultants has performed air dispersion modeling for industrial facilities, utilities, and government agencies. Trinity is recognized nationally and internationally for our skills and advanced modeling software/infrastructure, enabling Trinity to formulate and conduct dispersion modeling studies for numerous applications.
- Assessing impacts of air emissions
- Assessing impacts of offshore emissions
- Assessing visible plumes, icing, and fogging
- Performing off-site consequence analyses
- Evaluating individual and cumulative human and ecological risk
- Conducting off-site impact and deposition studies
- Performing fatal flaw analyses
- Predicting the impact of roadway air emissions
- Conducting regional modeling studies
- Conducting odor concentration modeling
- Analyzing potential risks associated with release of liquefied fuel gas (LFG) and liquefied natural gas (LNG)
- Predicting structural damage and personnel injury from the detonation of high explosives and vapor cloud explosions
- Processing model-ready meteorological data
- Regulatory air dispersion modeling
- Class I area PSD impact and regional haze analyses
- Photochemical Grid Modeling
- Multi-pathway risk assessment dispersion modeling
- High-performance computing solutions
- Model development and training
How Else We Can Help
Related Services
Air Quality Permitting
Trinity Consultants are experts in air permitting support for compliance with the Clean Air Act, offering comprehensive services from strategy, application development, and agency negotiations.
Ambient Monitoring and Service Integration
Trinity’s ambient air quality monitoring expertise ranges from the design and implementation of monitoring stations to routine operations, data validation, and official reporting to meet EPA and state requirements.
Regional Haze Support
Trinity's Regional Haze Support services guide clients through the intricacies of the Regional Haze Rule (RHR), ensuring compliance and progress towards natural visibility goals for Class 1 areas.
BREEZE Software
Our Results
Featured Projects
Government Steam Plant Streamlines Environmental Permitting and Compliance
The plant has engaged Trinity since 2008 for a wide variety of continual compliance activities that span air, oil pollution, waste, and water programs.
Trinity Brings Calm Vigilance to Packaging Giant’s Multisite Environmental Reporting Requirements
A very large packaging company in Illinois partnered with Trinity Consultants to evaluate and improve their environmental program.
A Global Chemicals Company Integrates for HSE Compliance Visibility
A long-time Trinity client engaged the air and Digital Solutions teams to support permitting and software installation needs.Regulatory Background
Air Modeling Tools
Photochemical Grib Modeling (PGM)
The Environmental Protection Agency (EPA) employs Photochemical Grid Modeling (PGM) as a crucial tool in its regulatory arsenal to safeguard air quality and public health. This sophisticated modeling technique is instrumental in understanding the complex interactions between air pollutants over vast geographical areas. By simulating the atmospheric conditions that affect the distribution, chemical transformation, and eventual deposition of pollutants, PGM provides the EPA with an invaluable predictive capability. This insight is essential for making informed decisions about air quality management, crafting regulations that effectively reduce emissions, and achieving compliance with national air quality standards. The modeling extends to both chemically reactive pollutants, which undergo transformations in the atmosphere, and inert pollutants that remain unchanged. The ability to accurately model these processes at regional scales is vital for addressing pollution from both single and multiple sources, enabling the EPA to develop strategies that protect both the environment and public welfare.