Part 70 Manufacturing General Permit: FAQ

Answers to some common questions about the Part 70 Manufacturing General Permit.

What are the advantages of the Part 70 Manufacturing General Permit?

  • The general permit incorporates flexibility that allows a facility to make changes and modifications as long as the requirements in the permit are met
  • General permits are less expensive than an individual permit
  • The permit includes a range of commonly applicable federal requirements

Why might I need to apply for the Part 70 Manufacturing General Permit?

If you started operating your facility without a permit and your potential to emit is above certain thresholds, you no longer qualify for a Registration Permit. Here's why: Once you have begun operation you are stuck with using your maximum, unrestricted potential to emit to define what type of permit you must get. Potential to emit is the maximum amount of a pollutant that a facility could possibly emit if it operated at maximum capacity for 24 hours a day and 365 days a year.

What if my facility potential to emit is over the Prevention of Significant Deterioration major source threshold for criteria pollutants?

Stationary sources subject to the source categories listed in 40 CFR Section 52.21(b)(1)(iii), Prevention of Significant Deterioration (PSD) may not obtain the Part 70 Manufacturing General Permit therefore the PSD major source thresholds that apply are 250 tpy or more of any criteria pollutant. This general permit will only be issued to stationary sources willing to limit their PTE to less than 250 tpy of each criteria pollutant. If you are unable or unwilling to limit your facility’s PTE below the major source PSD thresholds then your stationary source is not eligible for this general permit. 

What if my facility is over the major source thresholds for hazardous air pollutants?

If your facility’s potential emissions are over the threshold of 10 tons per year for an individual hazardous air pollutant or 25 tons per year for the total amount of hazardous air pollutants, then you must comply with any National Emission Standard for Hazardous Air Pollutants (NESHAP) that applies to you, and you are required to get a Part 70 permit. The Manufacturing General Permit is a type of Part 70 permit that contains NESHAPs common to manufacturing operations.

Can anyone apply for the Part 70 Manufacturing General Permit?

Yes, anyone can apply. However, if you apply for this general permit you must be able to stay under the limits of the permit. You will have to apply for an individual permit if you ever need to increase your emissions beyond the limits of the Part 70 Manufacturing Permit.

Does the permit expire?

Yes, this general permit will expire after five years. Since this is a general permit, the five year time period will begin when the general permit is issued. This means that every facility that receives this permit will have the same expiration date for their permit. You will have to apply for the next generation of the general permit 180 days before the expiration date.

As long as you apply for the next version of the general permit on time, then your current permit will continue to be valid until the MPCA issues you a new permit. An application fee for a General Permit (currently $1,140) is required.

Why would I want to apply for this general permit instead of an Individual Part 70 permit?

The main reasons to apply for this general permit are to save time and money. The process of applying for a Part 70 Individual permit is time-consuming for everyone because an individual permit is tailored for your specific facility. In comparison, the Part 70 Manufacturing General Permit is pre-written to cover a range of operations and applicable federal requirements, which streamlines the process. The time savings are reflected in the cost of the permit.

Furthermore, with the Part 70 Manufacturing General Permit facilities can make changes and modifications without applying for a permit amendment, as long as the Permittee continues to comply with the limits and requirements of the general permit.

The table below compares General Permit fees to a Part 70 Individual Permit.

Permit type

Part 70 General Permit

Part 70 Individual Permit, limits to remain below a threshold, with two NSPS Reviews

Application fee






Limits to remain below a threshold







What if I'm not sure I need this permit? What if I'm not sure I'm eligible for this permit?

The best way to answer these questions is to read over the application forms on this website starting with the Handbook and Application Instructions. The forms will guide you through a series of questions that will help you determine if you qualify for this permit.

What if I need help filling out the application forms or need more information?

Additional information is available at the links below. If you need further assistance, you may need to contact a consultant.