Air Quality Division Operational Memoranda are to provide guidance and to foster consistent application of the laws and administrative rules that govern Michigan's air programs. These documents are not intended to convey any rights to any parties nor create any duties or responsibilities under the law. These documents and matters addressed therein are subject to revision.

Clicking on the memo number will allow you to view the adjacent Operational Memo in Adobe Acrobat Reader.

Air Quality Division Operational Memoranda

No. 1 -- Modification of a Permit to Install or an Equivalent Emission Limit in a Renewable Operating Permit
Effective Date / Latest Revision Date: February 14, 1997

No. 2 -- Changes at a Stationary Source After Renewable Operating (RO) Permit Issuance
Effective Date / Latest Revision Date: November 26, 2001

No. 3 -- Procedure for Limiting Potential to Emit Below Major Source Thresholds Under the Renewable Operating Permit Program
Effective Date / Latest Revision Date: February 14, 1997

No. 4 -- Mechanisms for Limiting the Applicability of Michigan's Renewable Operating Permit Program
Effective Date / Latest Revision Date:  July 1, 2003

No. 5 -- Procedures for Correlating Michigan's and EPA's Definition of VOC
Effective Date / Latest Revision Date: October 13, 1995

No. 6 -- Procedure for Determining Emission Units
Effective Date / Latest Revision Date: February 20, 1996

No. 7 -- Procedure for Implementation of the Renewable Operating Program Application Shield
Effective Date / Latest Revision Date: February 14, 1997

No. 8 -- Applicability of the Operating Permit and Emission Fee Programs to Sources of Particulate Matter
Effective Date / Latest Revision Date: February 14, 1997

No. 9 -- Treatment of Rules Identified for Repeal in Renewable Operating Permit Applications
Effective Date / Latest Revision Date: June 21, 1996

No. 10 -- Procedures for Handling of Confidential Materials and Freedom of Information Requests for Confidential Materials
Effective Date / Latest Revision Date: February 28, 1997

No. 11 -- Stationary Source Determinations
Effective Date / Latest Revision Date: February 14, 1997

No. 12 -- Incorporating Changes to an Application for a Renewable Operating Permit
Effective Date / Latest Revision Date: February 14, 1997

No. 13 -- Criteria Pollutant Threshold Levels for the Emissions Inventory
Effective Date / Latest Revision Date: February 14, 1997

No. 14 -- Use of Visible Emissions Limits Less Than 20% Opacity In Permits
Effective Date / Latest Revision Date: May 6, 1997

No. 15  -- Procedure for Processing Permit Applications Subject to Federal Clean Air Act Section 112(G)
Effective Date / Latest Revision Date: September 25, 1998

No. 16 -- Procedure for Evaluating Plantwide Applicability Limits
Effective Date / Latest Revision Date: October 28, 1998

No. 17 -- Procedure for Processing Clean Corporate Citizen Permit Applications
Effective Date / Latest Revision Date: April 14, 2003

No. 18 -- Averaging Times and Compliance Testing
Effective Date: February 26, 2004

No. 19 -- Issue Resolution Process for Permit to Install Applications
Effective Date: August 26, 2004

No. 20 -- Best Available Control Technology (BACT) Determinations
Effective Date: August 24, 2005