Sullivan Environmental Consulting Inc. (established in 1988) provides atmospheric modeling, air sampling, and meteorological research services nationwide. Sullivan Environmental provides a wide range of air quality consulting services nationwide and internationally with dispersion modeling (including the ISCST3, CALPUFF, AERMOD, FEMS, PERFUM, and TOXST models) and air sampling (particulates, gases, various organic and inorganic compounds) serving as their primary specializations. Sullivan Environmental also specializes in exposure assessment, air permitting, urban air assessment, risk management planning, litigation services, air sampling, meteorological research, odor sampling, flux research, noise monitoring, and other specialty studies. Specialization includes the development of innovative air modeling methods and software, accident and emergency analysis, and Monte Carlo modeling methods. The firm has extensive experience in urban-scale modeling including studies in the United States, Eastern Europe, and Southeast Asia. The Certified Consulting Meteorologists and Certified Environmental Professional employed by Sullivan Environmental have approximately 90 years of combined professional experience and have managed many of the United States Environmental Protection Agency’s largest studies of toxic air pollution in the United States and in Eastern Europe.