Caltha staff have permitted a wide range of air emission sources under Federal and Minnesota State permitting programs. Caltha has supported most industrial sectors including light & heavy manufacturing, food sector, chemical industries, paper and forest products, primary and fabricated metals, electronic manufacturing and many others.

Due to particulate emissions, Dust Control Cyclone Systems often require a state air emission control permit

Permitted Dust Control Cyclone System


The first step for most clients is to determine if a permit is required at all. Changes at a facility can trip new requirements, such that a permit becomes necessary. Existing permitted facilities can also plan modifications to existing operations which require prior notification and/or permit modification. Caltha can provide early analysis of projects to determine air permitting requirements.

Caltha provides expertise in new permitting requirements, including those tied to the Boiler MACT, RICE MACT, and emergency generator permitting requirements, which can affect numerous facilities that in the past have not been required to obtain an air permit.

VOC emissions Often Require Spray Booths To Included In Facility Wide Air Emission Permit

Spray Booth Included In Facility Wide Air Emission Permit


Typical air quality services provided in Minnesota include:

  • Project reviews to determine federal and Minnesota Pollution Control Agency air permitting requirements
  • Determination of potential to emit (PTE)
  • Determination of New Source Performance (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP) requirements
  • Completion of MPCA air emission control permit applications
  • Development of recordkeeping and compliance procedures
  • Annual emission inventory reports
  • Compliance certification reports
  • Certified opacity testing
  • Stack testing
  • Air regulation – Air emission permit compliance auditing


Caltha LLP | Your Air Permit, Wastewater Permit, Storm Water Permit Partner

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