Amendments to air quality rules - Exempt source/conditionally insignificant activities

The Minnesota Pollution Control Agency (MPCA) is proposing amendments to rules governing air quality, Minnesota Rules chapters 7005, 7007, 7008, 7011, and 7019.

The proposed rules are open for public comment from April 23 through May 29, 2018.

  • The proposed rules and related documents are provided below under rulemaking documents.
  • Written comments should be submitted to the Office of Administrative Hearings Rulemaking e-Comments webpage:

A public information meeting on the proposed rules was held at MPCA's St. Paul office and via Skype. The meeting (May 10, 2018) provided an overview of the proposed rule amendments so that interested persons are able to provide written comments. Meeting materials are listed with the rulemaking documents.

The purpose of the exempt source/conditionally insignificant activities rulemaking is to clarify permit requirements for small sources of air emissions and update rules governing the treatment of small air pollution emitting activities. These activities are described as “insignificant activities” and “conditionally insignificant activities” in the rules. The MPCA is also considering creating new categories of conditionally exempt sources, such as auto-body refinishing facilities and woodworking facilities. Such facilities that meet applicable technical standards would be exempt from obtaining an air emissions permit.

This rulemaking is needed to address several issues with the requirements for conditionally exempt stationary sources and conditionally insignificant activities (CIA), and to meet federal requirements for affected sources. Historically, the MPCA created an air emission permit hierarchy to incentivize the small source facilities, such as auto body refinishing facilities, to reduce their air emissions through more streamlined compliance requirements for low air emissions. The rule amendments will continue to streamline the administrative requirements for the lower emitting small source facilities while complying with applicable state and federal requirements. The main benefit of the rule amendments will be administrative, but they will also ensure that the rules limiting air emissions are federally enforceable.



Publish Request for Comments

January 9, 2017

Stakeholder engagement

Stakeholder meeting on proposed concepts for amending the rules (January 19, 2017)

Publish Dual Notice of proposed rules

April 23, 2018

Stakeholder engagement Public information meeting on proposed rule amendments (May 10, 2018)

Final adoption of rules:

  • no hearing
  • with a hearing

Approximate time:

  • 3 months after Notice of Intent
  • 6 months after Notice of Intent



For questions about rule content or technical aspects of the rule:

Hassan Bouchareb

For questions about the rule process or schedule:

Mary H. Lynn