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Synthetic Organic Chemical Manufacturing Industry: Organic National Emission Standards for Hazardous Air Pollutants (NESHAP) - 40 CFR 63 Subparts F,G,H,I

Synthetic Organic Chemical Manufacturing Industry: Organic National Emission Standards for Hazardous Air Pollutants (NESHAP) - 40 CFR 63 Subparts F,G,H,I
Basic Information
Legal Authorities
  • 42 U.S.C. §7401
Federal Register Citations
  • 71 FR 76603
  • 71 FR 34422
  • 69 FR 76894
  • 69 FR 76859
  • 65 FR 3169
  • 63 FR 67787
  • 62 FR 44614
  • 62 FR 44608
  • 62 FR 2722
  • 61 FR 64572
  • 61 FR 43698
  • 61 FR 31435
  • 61 FR 7761
  • 61 FR 7716
  • 60 FR 63624
  • 60 FR 18078
  • 60 FR 18071
  • 60 FR 18026
  • 60 FR 18020
  • 60 FR 5320
  • 59 FR 54154
  • 59 FR 53392
  • 59 FR 48175
  • 59 FR 29196
  • 59 FR 19402
  • 57 FR 62608
Code of Federal Regulations Citations
  • 40 CFR Part 63 Subpart F
  • 40 CFR Part 63 Subpart G
  • 40 CFR Part 63 Subpart H
  • 40 CFR Part 63 Subpart I
Docket Numbers
  • EPA-HQ-OAR-2002-0026
  • EPA-HQ-OAR-2004-0281
  • EPA-HQ-OAR-2004-0284
  • EPA-HQ-OAR-2005-0475
Effective Date
  • April 22, 1994
  • June 6, 1994
  • September 20, 1994
  • January 27, 1995
  • April 10, 1995

On this page:

  • Rule Summary
  • Rule History
  • Additional Resources
  • Compliance

Rule Summary

This National Emission Standards for Hazardous Air Pollutants (NESHAP) rule consists of four subparts in 40 CFR part 63. Subpart F provides the applicability criteria for Synthetic organic chemical manufacturing industry (SOCMI) sources, requires that owners and operators of SOCMI sources comply with subparts G and H, and specifies general recordkeeping and reporting requirements. The specific control, monitoring, reporting, and recordkeeping requirements are stated in subpart G for process vents, storage vessels, transfer racks, and wastewater streams, and in subpart H for equipment leaks. Subpart I provides the applicability criteria for the non-SOCMI processes subject to the negotiated regulation for equipment leaks and requires owners and operators to comply with subpart H.

Rule History

12/21/2006 – Final Rule

06/14/2006 – Proposed Rule; amendments

12/23/2004 – Proposed Rule & Direct Final Rule 

01/20/2000 – Proposed Rule; amendments

12/09/1998 – Final Rule Correction

08/22/1997 – Proposed Rule; correction  & Proposed Rule; amendments

01/17/1997 – Final Rule: amendments

12/05/1996 – Final Rule: amendments

08/26/1996 – Proposed Rule: amendments

06/20/1996 – Final Rule: amendments

02/29/1996 – Proposed Rule & Direct Final Rule 

12/12/1995 – Final Rule; correcting amendments

04/10/1995 – Proposed Rule: clarification

04/10/1995 – Proposed Rule & Direct Final Rule

04/10/1995 – Final Rule; amendments

01/27/1995 –  Final Rule & Extension of Compliance

10/28/1994 – Notice of Partial Stay and Reconsideration & Proposed Compliance Extension and Proposed Changes to Subpart H

10/24/1994 – Proposed Amendments & Notice of Partial Stay and Reconsideration & Proposed Amendments

09/20/1994 – Correcting Amendments

06/06/1994 – Final Rule

04/22/1994 – Final Rule

12/31/1992 -  Proposed Rule (txt) (txt) (1.34 MB)

Additional Resources

Questions and Answers for Subparts H and I of Part 63 Hazardous Organic NESHAP (HON) Equipment Leak Provisions

Alternative Means of Emission Limitation for Leak Detection and Repair

Compliance

Chemical Sector Clean Air Act Section 114 Information Collection Request

Process-Based Self-Assessment Tool for the Organic Chemical Industry

Inspection Tool for the Hazardous Organic NESHAP (HON) Volumes I & II: Overview of Emission Points, Control Technologies, HON Previsions, and Inspection Checklists

Contact Us to ask a question, provide feedback, or report a problem.
Last updated on January 18, 2023
United States Environmental Protection Agency

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