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You need to obtain a MassDEP air quality plan approval before starting work on a project that adds a new emissions source, or changes or replaces an existing source, unless you qualify for an exemption or an alternative compliance pathway.
You will most likely need to obtain a MassDEP Air Plan Approval before beginning work on a:
Some projects are exempt from the Plan Approval requirement or qualify for an alternative compliance pathway, such as a permit-by-rule or compliance certification.
For example, many of the following types of installations require only one-time compliance certifications:
To learn more about facilities that require Air Plan Approvals, see the Overview & Applicability Tables in Additional Resources below.
Your Limited Plan Application (LPA) or Comprehensive Plan Application (CPA) will need to propose best available air pollution control technology (BACT) for your project.
See the policy and guidance documents in Additional Resources below to learn more.
Based on pre-application discussions, MassDEP may require ambient air quality modeling for your project. If so, you will need to file an Air Quality Modeling Submittal.
See the Modeling Guidance in Additional Resources below.
Follow the links below for detailed information on applying via eDEP Online Filing for a MassDEP Air Plan Approval.
The agency may also require you to submit one or more Supplemental and/or Pollution Control Device forms forms along with your application. Most of these can be completed via the eDEP Online Filing system.
Note: If you are a new eDEP user, you will need to create an account first.
Most of the supplemental forms that you might need to submit as part of an Air Plan Approval Application - including Pollution Control Device forms - can be completed via the eDEP Online Filing system.
The two supplemental forms in Additional Resources below, if required as part of your application, will need to be completed and uploaded to eDEP as attachments.
After obtaining a Plan Approval from MassDEP, you will need to submit an Administrative Amendment to:
If you have multiple Plan Approvals, you may voluntarily streamline their various applicable requirements into one enforceable document through a Consolidation.