GT provides extensive environmental air quality services to a wide range of clients, including utilities, chemical industry, iron and steel industry, petroleum products distribution and general manufacturing.


GT assists our clients in obtaining timely air permits that maximize operating flexibility and minimize monitoring, recordkeeping, reporting and testing requirements. Whenever possible, GT develops strategies that avoid air permitting requirements by taking full advantage of air permitting exemptions. GT develops strategies that avoid Prevention of Significant Deterioration (PSD) and Non-Attainment New Source Review (NNSR) permitting requirements. GT prepares monitoring, recordkeeping, and reporting programs that satisfy Permit-to-Install (PTI), Permit-to-Install and Operate (PTIO) and Title V requirements. GT conducts regulatory assessments for New Source Performance Standards (NSPS), National Emission Standard for Hazardous Air Pollutants (NESHAPs), and Maximum Achievable Control Technologies (MACT) Standards.

GT’s air consulting services include:

  • Title V Permitting
  • Prevention of Significant Deterioration (PSD) Permitting
  • Non-Attainment New Source Review (NNSR) Permitting
  • Minor Source Permitting
  • Air Quality Modeling/Air Dispersion Modeling
  • Air Emission Inventories
  • Greenhouse Gas Monitoring Plans and Reporting
  • Risk Management Plans (112r)
  • Startup, Shutdown and Malfunction Plans
  • RACT/BACT/LAER Studies
  • NSPS/NESHAP/MACT Regulatory Assessments
  • Enforcement Support
  • Permit Negotiations
  • Quarterly, Semi-Annual and Annual Compliance Reporting
  • Refrigerant Management Plans
  • Stack Test Programs
  • Facility Inspections and Audits