Geosyntec applies models to demonstrate compliance with allowable ground-level concentrations established by regulatory agencies. We have experience applying various air dispersion models ranging from those that predict ground-level concentrations from continuous emission sources to consequence analysis models used to assess impacts from unplanned catastrophic events.

We use air dispersion modeling to assist clients with regulatory and nonregulatory air modeling projects, including permit applications to address ambient air quality and air toxic requirements. Our team works closely with clients to assess plant layout and stack location configurations to avoid negative impacts on the regional airshed and local communities. In addition, our practitioners conduct modeling to evaluate potential offsite impacts associated with risk assessments and hazard analyses. Our modelers are experienced with AERMOD/AERSURFACE/AERSCREEN/SCREEN3, CALPUFF, ALOHA, SLAB and Computational Fluid Dynamics (CFD) models.

Our advanced collection and measurement methods help us generate robust data for air dispersion models that describe the complex behavior of pollutants in the air and how they interact with their environment. Our air dispersion modeling experience includes emerging pollutants such as ethylene oxide (C2H4O) and PFAS. Armed with this data, our engineers and scientists can accurately assess how a source affects a particular area and consult with clients on developing comprehensive environmental management strategies.