Emissions Modeling

For various projects, ambient air dispersion modeling may be required to demonstrate that a facility’s emissions will not cause or contribute to an exceedance of applicable state-specific toxics thresholds, National Ambient Air Quality Standards (NAAQS) or Prevention of Significant Deterioration (PSD) increment values. Because dispersion-modeling requirements vary by State, and are subjective and project-specific, TecServ tailors each modeling project to maximize the facility’s operational flexibility and to depict actual facility operating conditions.

Whether screening analyses or refined modeling are required, TecServ will assist a facility with all aspects of the modeling process, including:

• Determining the appropriate modeling strategy based on agency requirements, facility operation and type of emissions.
• Developing a written modeling protocol for agency approval.
• Preparing modeling input files, including emission rates, stack parameters, and dispersioncharacteristics.
• Developing and/or retrieving interactive source inventories.
• Conducting an analysis of results and, if necessary, developing alternative modeling scenarios.
• Preparing technical modeling reports for submittal to regulatory agencies.
• Negotiating with agency personnel to ensure proper interpretation of project data and results.

TecServ professionals are experienced in performing modeling for various types of industrial processes and regulatory programs, including toxics management and minor and major source construction/operation permitting. Ensuring that facility data and process characteristics are utilized appropriately in the modeling assists in retaining operational flexibility, while allowing the facility to meet production goals.

As represented in the attached resumes of key personnel, TecServ’s experience and exposure to air-quality related issues and emission factor development assist in ensuring that facility emissions are appropriately characterized and that facility compliance needs are met.