Air Toxics Notebook
Case-By-Case MACT -  Subpart B

Applicability: eCFR Subpart B [ecfr.gov]

Subpart B implements Sections 112(g)(2)(B) and (j) of the Clean Air Act:
  1. Section 112(g)(2)(B)
    • Requires new or reconstructed Major Sources of hazardous air pollutants to apply case-by-case maximum achievable control technology (MACT), if no NESHAP applies.
  2. Section 112(j)
    • Requires Major Sources of Hazardous Air Pollutants to obtain a Title V operating permit with case-by-case MACT requirements, if they are within a listed source category where EPA was required to promulgate a standard and no standard exists.
Rules apply to small, area sources? No
Known Sources in NDEE Jurisdiction:
Date of Original Final Rule: 5/20/94
Amendments Dates: 07/11/2005 (70 FR 39664)
05/30/2003 (68 FR 32586)
04/05/2002 (67 FR 16582)
06/30/1999
05/14/1999
12/27/1996 (61 FR 68384)
05/10/1996
State Regulations (Title 129): Title 129, Chapter 27, Section 003 and 005. Sources are also responsible for ensuring they are in compliance with current federal requirements found for this subpart in the CFR.
Federal Regulations: 63.40 - 63.44 - 112(g) requirements
63.50 - 63.56 - 112(j) requirements
Related Rules:

NESHAP - 40 CFR Part 63

Subpart A - General Provisions
Subpart C - List of Hazardous Air Pollutants, Source Categories
Subpart D - Compliance Extensions for Early Reductions of HAPs
Regulations and Federal Registers: eCFR Subpart B [ecfr.gov]

On March 30, 2010, EPA proposed to amend the rule governing case-by-case emission limits for major sources of hazardous air pollutants under section 112(j) of the Clean Air Act. The porposed rule was never made final.

(See attached file: 1B - Fed. Reg. 2010-03-30 - Proposed Rule.pdf)

(See attached file: 1B - Fed. Reg. 2005-07-11 - Final Rule.pdf)

(See attached file: 1B - Fed. Reg. 2003-05-30 - Final Rule.pdf)

(See attached file: 1B - Fed. Reg. 2002-04-05 - Final Rule.pdf)

(See attached file: 1B - Fed. Reg. 1996-12-27 - Final Rule.pdf)
SizeFile Name
85 KB 1B - Fed. Reg. 2010-03-30 - Proposed Rule.pdf
179 KB 1B - Fed. Reg. 2005-07-11 - Final Rule.pdf
223 KB 1B - Fed. Reg. 2003-05-30 - Final Rule.pdf
275 KB 1B - Fed. Reg. 2002-04-05 - Final Rule.pdf
229 KB 1B - Fed. Reg. 1996-12-27 - Final Rule.pdf
Forms:
Important Dates:
FAQs, Fact Sheets, and Rule Summaries: Clean Air Act Section 112 [law.cornell.edu]

EPA's 112(g) Website [epa.gov]

EPA's 112(j) Website [epa.gov]
Presentations, Training and Articles: Federal Rules for Boilers Vacated - AirWaves January 2008 Article
Other Information and Resources:
Notes:
Page Last Updated: 1/25/18