Polyether Polyols Production: National Emission Standards for Hazardous Air Pollutants (NESHAP)
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Rule Summary
Polyether polyols are used in making lubricants, adhesives, sealants, cosmetics, soaps, and feedstock polymers for urethanes production. Air toxics can be emitted at several points along the manufacturing process.
The hazardous air pollutants (HAP) emitted by the facilities producing polyether polyols include ethylene oxide (EtO), propylene oxide (PO), hexane, toluene, and incidental emissions of several other HAP. Some of these pollutants are considered to be probable human carcinogens when inhaled, and all can cause toxic effects following exposure.
See the rule history below for more details.
Rule History
02/26/2025 - Polyether Polyols Production Industry Proposed Rule; Comment Period Extension
12/27/2024 - Polyether Polyols Production Industry Proposed Rule
03/27/2014 - Polyether Polyols Production Industry Final Rule
03/21/2012 - Polyether Polyols Production Reopening of Public Comment Period
01/09/2012 - Polyether Polyols Production Proposed Rule
07/01/2004 - Equation Correction
07/06/2000 - Polyether Polyols Production Withdrawal of Amendment in Direct Final Rule
06/01/1999 - Polyether Polyols Production Final Rule
03/09/1999 - Polyether Polyols Production Proposed Rule; Amendments
11/12/1997 - Polyether Polyols Production Reopening of Proposed Rule Public Comment Period
10/20/1997 - Polyether Polyols Production Proposed Rule; Correction
09/04/1997 - Polyether Polyols Production Proposed Rules and Notice of Public Hearing
Additional Resources
Documents from the 2024 Proposal
- Redline Strikeout of Part 63 Subpart PPP (pdf)
- Risk Modeling File (xlsx)
- Fact Sheet: Proposed Amendments to the Air Toxics Standards for Polyether Polyols Production (pdf)
Polyether Polyols Production Presumptive MACT (P-MACT)
Basis and Purpose Document for Proposed Standards
Economic Impact Analysis (EIA) for the Proposed Polyether Polyols NESHAP
Polyether Polyols Production BID for Final Rule - Summary of Public Comments
Fact Sheets for Polyether Polyols Production NESHAP
View the supporting documents in the docket folder to find additional related documents to this rule.
Compliance
Implementation Document for the Polyether Polyols Production NESHAP (40 CFR 63, Subpart PPP)