Minor Source

Minor Sources of air emissions are regulated under Chapter 115 of the Department's Regulations.

Minor sources include facilities with Potential to Emit less than the following:

50 ton per year VOC
10 ton per year of single Hazardous Air Pollutant
25 ton per year of all Hazardous Air Pollutants combined
100 ton per year of any other regulated pollutant

Chapter 115 (Minor Source) General Application Materials

Application forms are available in Adobe PDF and Microsoft Word format. All other documents are in Adobe format.

General Information
General Application [Microsoft Word Version]
Application Instructions
Public Notice of Intent to File
Air Emission License Revised fee schedule
Public Notice of Draft License Availability (Click here if you are publishing a draft notice for an NSR project)

Mineral Processing Application Materials

The following application materials are specific to the mineral processing industry and may be used by any facility wishing to license rock crushers, asphalt plants, and concrete batch plants.

Mineral Processing Application [Microsoft Word Version]
Mineral Processing Instructions [Microsoft Word Version]
Public Notice of Intent to File

Chapter 115 Minor Revision Application

For a Minor Revision, the application submission shall consist of a letter requesting the Minor Revision with the reason for the request, and any relevant information such as description of the revision and any emission calculations. the signatory sheet signed by a responsible official shall be included in the submittal.

Chapter 115 License Transfer Application

Application forms are available in Adobe PDF and Microsoft Word format.

Application [Microsoft Word version]

Synthetic Minor

Sources with the potential to emit air pollutants greater than major source thresholds are required to take federally enforceable emission limitations and/or operation caps in order to be exempt from major source (Title V) licensing requirements.

Utilization of Specification Waste Oil

Facilities licensed to operate fule oil fired boilers may substitute waste oil for fuel oil up to licensed fuel use thresholds. Specification and Non-specification waste oil use must follow waste oil use guidelines.

BACT Analysis

Applications for new sources and minor and major modifications to existing sources require a Best Available Control Technology (BACT) analysis. A BACT analysis is a topdown analysis reviewed on a case-bycase basis taking into account energy, envirionmental, and economic impacts. Download NESCAUM's BACT Guideline for a detailed explanation.

Complete air emission license applications should be mailed to:

DEPARTMENT OF ENVIRONMENTAL PROTECTION
Bureau of Air Quality
17 State House Station
Augusta, Maine 04333-0017

If you have any questions regarding the application or information, please contact air emission licensing staff at the above address or telephone (207)287-2437. The Bureau of Air Quality's fax number is (207)287-7641.