Photochemical Modeling
Understand air quality impacts on regional and national scales. STI uses EPA-accepted models such as CMAQ and CAMx to evaluate air quality for single-source impact assessments, state implementation plan (SIP) development, exceptional event demonstrations, and policy analyses.
Single-Source Impacts
Assess single-source air quality impacts on ozone and secondary PM2.5 to meet EPA requirements issued in the revised Guideline on Air Quality Models (Appendix W). Our single-source impact assessments are used for New Source Review (NSR), Prevention of Significant Deterioration (PSD), and other EPA regulatory programs.
Meteorological Modeling
Conduct meteorological modeling to inform forecasting, develop inputs for air quality models, and understand how meteorological conditions influence pollutant chemistry and transport. Using models such as the Weather Research and Forecasting Model (WRF), we work with clients to evaluate source-receptor relationships, improve meteorological outputs through targeted observations and data assimilation, and support alternative energy applications.
Air Dispersion Modeling
Evaluate the near-field air quality impacts from stationary sources and transportation projects. STI scientists use a variety of dispersion models, including AERMOD, CALINE, and R-LINE, to help our clients conduct research and perform human health assessments and PM hot-spot analyses.
Stationary Sources
Understand the fate and transport of pollution from stationary sources to support air quality management planning, meet compliance needs, and mitigate impacts on public health.
Transportation Sources
Understand how travel activity, meteorology, and other factors contribute to near-road air pollution, and evaluate real-world impacts of on-road mobile sources.
1450 N. McDowell Blvd., Suite 200
Petaluma, California 94954
Contact
+1 707-665-9900
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