John Tsun is a Project Director and SCS’s National Practice Leader for Industrial Clean Air Act (CAA) Services, with more than 35 years of experience leading complex environmental compliance projects. His background spans a wide range of industrial sectors, including petroleum, pharmaceutical, chemical, power generation, manufacturing, and government agencies.
John specializes in air-quality and emissions-related programs, providing expertise in ambient air monitoring, air dispersion and consequence modeling, soil vapor dispersion modeling, vapor intrusion barrier installation, vapor intrusion sampling, vibration and structural movement monitoring, and environmental noise assessments.
He is highly experienced in regulatory compliance strategy, preparation of state and federal air permit applications, computer-based air-quality modeling, and Title V reporting. John has deep technical proficiency with major EPA-approved dispersion models, including CALPUFF, ISC-Prime, and AERMOD.
