Wisconsin (Part 63) MACT Standards Delegations

Clean Air Act Section 112 Major and Area Source Standards

EPA's final delegation approval of Section 112 NESHAP standards for Wisconsin constitutes a program of straight delegation of all existing and future air toxic standards regardless of a source's Part 70 (Title V) applicability.

EPA approved, through a “direct final” procedure, Wisconsin's request for delegation of the Federal air toxics program contained within 40 CFR Parts 61 and 63 pursuant to Section 112(l) of the CAA as amended, effective June 2, 1997. The State's requested mechanism of delegation involves either the delegation of all existing and future Section 112 standards as federally promulgated, for promulgation as State standards (or rules), or to incorporate Federal standards into State air pollution control permits, reserving the right to promulgate the standards as a State rule at a later time. The actual delegation of authority occurs through a memorandum of agreement (MOA) between the Wisconsin Department of Natural Resources (WDNR) and EPA. 

1. General Provisions (40 CFR part 63 subpart A)
2. Perc Dry Cleaners (40 CFR part 63 subpart M)
3. Chromium Electroplating (40 CFR part 63 subpart N)
4. Industrial Process Cooling Towers (40 CFR part 63 subpart Q)
5. Degreasing Organic Cleaners or Halogenated Solvent Cleaning (40 CFR part 63 subpart T)
6. Secondary Lead Smelters (40 CFR part 63 subpart X)

WDNR has both implementation and enforcement authority for these rules and the rules have been incorporated into Wisconsin State rules.

For all other MACT standards, WDNR has chosen to incorporate the Federal standards into State air pollution control permits (Title V’s) to be used as a mechanism for implementation and enforcement authority. WDNR has chosen not to take full or partial delegation of newly promulgated area source MACT rules. Visit Wisconsin NSPS and NESHAP delegation page for additional documents.

Federal Register Documents for Approval of Section 112(l) Program of Delegation

• Direct Final Rule Correction of Effective Date under Congressional Review Act (Federal Register Notice 63 FR 24116) - May 1, 1998
• Proposed Rule (Federal Register Notice 62 FR 15452) - April 1, 1997
• Direct Final Rule (Federal Register Notice 62 FR 15402) - April 1, 1997

Memorandum of Agreement, Delegation Request, and Other Historical Documentation

• Wisconsin 112 (l) Delegation (pdf) (2.45 MB, Dec. 16, 1999)
• Wisconsin 112 (l) Memorandum of Agreement (pdf) (2.95 MB, July 26, 1996)
• EPA Completeness Review for Wisconsin's 112 (l) Delegation Request (pdf) (822.28 KB, March 28, 1996)
• Wisconsin DNR 112 (l) Delegation Request (pdf) (506.93 KB, Dec. 22, 1995)
• Wisconsin AG 112 (l) Opinion (pdf) (403.28 KB, Oct. 6, 1995)
• Wisconsin 112 (l) Delegation (pdf) (788.69 KB, Dec. 9, 1994)