Air Toxics Notebook
Wet-formed Fiberglass Mat Production -  Subpart HHHH

Applicability: eCFR Subpart HHHH [ecfr.gov]

You must comply with this subpart if you meet the following criteria:
1. You own or operate a drying and curing oven at a wet-formed fiberglass mat production facility and
2. Your drying and curing oven or the facility at which your drying and curing oven is located is a major source of hazardous air pollutants (HAP).

Applies to major sources of HAP that operate a drying or curing oven at a wet-formed fiberglass mat production facility. Wet-formed fiberglass is a substrate for asphalt roofing products.
Rules apply to small, area sources? No
Known Sources in NDEQ Jurisdiction: No
Date of Original Final Rule: 4/11/02
Amendments Dates: 02/28/2019 - Final Rule
04/06/2018 - Proposed Rule
04/11/2002 - Final Rule
State Regulations (Title 129): As of September 28, 2022: Title 129, Chapter 13, Section 002.61

Previously: Chapter 28, Section 001.55.

Sources are also responsible for ensuring they are in compliance with current federal requirements found for this subpart in the CFR.
Federal Regulations: 40 CFR 63.2980
Related Rules:

NSPS - 40 CFR Part 60

Subpart HHH - Synthetic Fiber Production
Subpart PPP - Wool Fiberglass Insulation

NESHAP - 40 CFR Part 63
Subpart DDD - Mineral Wool Production
Subpart NNN - Wool Fiberglass Mfg.
Regulations and Federal Registers:
eCFR Subpart HHHH [ecfr.gov]
(See attached file: 4H - Fed. Reg. 2019-02-28 - Final Rule.pdf)
(See attached file: 4H - Fed. Reg. 2018-04-06 - Proposed Rule.pdf)

(See attached file: 4H - Fed. Reg. 2002-04-11 - Final Rule.pdf)

SizeFile Name
357 KB 4H - Fed. Reg. 2019-02-28 - Final Rule.pdf
415 KB 4H - Fed. Reg. 2018-04-06 - Proposed Rule.pdf
277 KB 4H - Fed. Reg. 2002-04-11 - Final Rule.pdf
Forms:
Important Dates:
FAQs, Fact Sheets, and Rule Summaries: EPA's Subpart HHHH Website [epa.gov] - contains federal register notices and implementation tools
Presentations, Training and Articles:
Other Information and Resources:
Notes:
Page Last Updated: 12/2/22