Small Business Assistance - Permit Primer
Air Permits - Existing Businesses
Do
you have an operation permit already?
NOTE: You may have an existing operation permit on file with the DNR. Check your files for an air permit document with reference to a 9-digit number followed by the suffix - P0X -F0X - S0X or -G0X. (see PDF example below - opens in new window).
Final
Operation Permit (first 3 pages) 
(PDF, 14 KB)
Small
Business Assistance