Agency Report to JCAR-Page 2
Part 6 contains rules developed to fulfill the federal Clean Air Act (CAA) 42 U.S.C. 7401 et seq.,
requirements referred to as “Reasonably Available Control Technologies” (RACT). They are
necessary to address moderate nonattainment area provisions for National Ambient Air Quality
Standards (NAAQS). For past standards, EGLE promulgated RACT rules for existing volatile organic
compound (VOC) sources in the nonattainment areas established under those standards. With the
establishment of a new standard, the state must:
1) Revise existing RACT rules to align with the most recent recommendations contained in the
United States Environmental Protection Agency’s (USEPA) Control Technique Guidelines (CTGs) as
required by the CAA Section 182(b)(2).
2) Evaluate VOC sources in the NAAQS nonattainment areas based on the more recently created
CTG categories.
3) Promulgate new rules setting or revising emission standards and operational requirements for
certain types of existing emission sources applicable to CTGs, beyond those established as rules
under previous standards, for the nonattainment areas. These nonattainment areas consist of the
following counties: Allegan (partial), Berrien, Livingston, Macomb, Monroe, Muskegon (partial),
Oakland, St. Clair, Washtenaw, and Wayne.
Additionally, the CAA requires Michigan to show reasonable further progress by reducing VOC
emissions in the nonattainment areas by fifteen percent from the baseline year. To meet this
requirement, beyond the reductions gained from implementing VOC RACT rules, EGLE has also
revised and drafted additional rules that address volatile chemical products.
4. Summary of proposed rules:
The proposed rule set (2022-18 EQ) will amend the current Part 6 containing rules developed to
fulfill the federal Clean Air Act (CAA) 42 U.S.C 7401 et seq., requirements referred to as
“Reasonably Available Control Technologies” (RACT). They are necessary to address moderate
nonattainment area provisions for National Ambient Air Quality Standards (NAAQS). For past
standards, EGLE promulgated RACT rules for existing VOC sources in the nonattainment areas
established under those standards. With the establishment of a new standard, the state must:
1)Revise existing RACT rules to align with the most recent recommendations contained in the United
States Environmental Protection Agency’s (USEPA) Control Technique Guidelines (CTGs) as
required by the CAA Section 182(b)(2).
2)Evaluate VOC sources in the NAAQS nonattainment areas based on the more recently recreated
CTG categories.
3)Promulgate new rules setting or revising emission standards and operational requirements for
certain types of existing emission sources applicable to CTGs, beyond those established as rules
under the previous standards, for the nonattainment areas. These nonattainment areas consist of the
following counties: Allegan (partial), Berrien, Livingston, Macomb, Monroe, Muskegon (partial),
Oakland, St. Clair, Washtenaw, and Wayne.
Additionally, the CAA requires Michigan to show reasonable further progress by reducing VOC
emissions in the nonattainment areas by fifteen percent from the baseline year. To meet this
requirement, beyond the reductions gained from implementing VOC RACT rules, EGLE has also
revised and drafted additional rules that address volatile chemical products.
If approved, the rules will be submitted to the USEPA as an amendment to the Michigan State
Implementation Plan (SIP). The comment period and hearing will fulfill requirements contained in
the state administrative rules and the CAA.
MCL 24.242 and 24.245
