1. Instructions: BWP AQ 10 doc format of    Operating Permit Minor Modification Instructions

  2. Form: BWP AQ 10 doc format of    Operating Permit Minor Modification Form  pdf format of Operating Permit Minor Modification Form & Instructions

  3. Transmittal Form & Number for Permit Application & Payment


Permit Fact Sheet 

  1. What is the Purpose of a Minor Modification?
    The purpose of an Operating Permit Minor Modification (OPM) is to revise information in the Operating Permit to reflect changes in emissions and/or applicable requirements.  A revision to an Operating Permit is not required for increases in emissions that are authorized by allowances acquired pursuant to the Acid Rain program under Title IV, provided that such increases do not require an Operating Permit revision under any other applicable requirement.
  2. Who Must Apply for a Minor Modification?
    Pursuant to 310 CMR 7.00:Appendix C(8)(a)2, a minor modification application is used by an owner or operator of a facility holding an Operating Permit if the proposed change:
    • Does not violate any applicable requirements;
    • Does not involve significant change(s) of existing monitoring, reporting, or record keeping requirements in the OP;
    • Does not require or change a case-by-case determination of an emission limitation or other standard, or a source-specific determination for temporary sources of ambient impacts, or a visibility or increment analysis;
    • Does not seek to establish or change a permit term or condition for which there is no corresponding underlying applicable requirement and that the facility has assumed to avoid an applicable requirement to which the facility would otherwise be subject; and
    • Is not a modification under any provision of 42 U.S.C. 7401, Title I.
  3. How is a Minor Modification Processed and What are the Timelines?
    For an owner or operator of a facility to apply for a minor modification to their Operating Permit, a complete application must be filed, in duplicate.  The application must be submitted on form BWP AQ10 and in accordance with the timelines established at 310 CMR 7.00: Appendix C(4).
    A timely application is one that is submitted concurrent with the planned modification.
    • The Department will use the completed permit modification application to notify the EPA and affected states within five business days of receipt by the Department.
    • The Department shall take final action within 90 days of receipt of the Minor Modification application or 15 days after the end of the EPA’s 45 day review period under 310 CMR 7.00:  Appendix C(6), whichever is later. 
    • For group processing of minor modifications the final action shall be completed within 120 days of receipt of the minor modification application or 15 days after the end of EPA’s 45-day review period under 310 CMR 7.00:  Appendix C(6), whichever is later.
    • The facility may make the change upon receipt by the Department of the complete proposed OPM application. 
    • A minor modification, for the purposes of the acid rain portion of the Operating Permit, shall be governed by 40 CFR Part 72.
    • The permit shield provisions of 310 CMR 7.00:  Appendix C(12)  shall not apply to changes made under 310 CMR 7.00:  Appendix C(8)(a)2.
  4. What is the Application Fee?
    There is no fee for this application.
  5. What is the Primary Permit Location? What is the Reserve Copy Location?
    Primary Permit Location:                                                Reserve Copy Location:
    Dept. of Environmental Protection                                 Dept. of Environmental Protection
    _______________*Regional Office                                 _______________*Regional Office
    Bureau of Waste Prevention                                           Bureau of Waste Prevention
    *Find Your Region
    All completed application packages should be submitted in duplicate (one primary copy, one reserve copy) to the appropriate regional office for review and approval.
    Upon approval of the application, MassDEP stamps the reserve copy and returns it to you for your records.  In this manner, MassDEP and the applicant have identical copies of the approved submittal.
  6. How Can I Avoid the Most Common Mistakes Made in Applying for a Minor Modification?
    • Answer all questions on the form and indicate “N/A” (not applicable) where appropriate.
    • Submit all supplementary information requested in the application.
    • Submit two copies of the application to the regional office for review.  One copy must have original signatures.  The reserve, or duplicate copy may be a photocopy. 
    • Submit fee and one copy of the MassDEP Transmittal Form to:  Department of Environmental Protection, PO Box 4062, Boston MA  02211.
  7. What are the Regulations that Apply to These Permits?  Where Can I Get Copies?
    These regulations include, but are not limited to:
    • Air Pollution Control Regulations, 310 CMR 6.00-8.00
    • Timely Action and Fee Provisions, 310 CMR 4.00.

These may be purchased online, in person, or by Mail at the Massachusetts State Bookstore