G/TBT/N/USA/1556/Add.4  
 
 
4 January 2022  
(23-0028) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
NOTIFICATION  
Addendum  
The following communication , dated  4 January 2023, is being circulated at the request of the 
delegation of the United States of America . 
 
_______________  
 
 
Title:  National Emission Standards for Hazardous Air Pollutants: Miscellaneous Organic Chemical 
Manufacturing Residual Risk and Technology Review  
 
Reason for Addendum:  
[ ] Comment period changed - date:   
[ ] Notified measure adopted - date:  
[X] Notified measure published - date: 21 December 2022  
[X] Notified measure enters into force - date: 21 December 2022  
[X] Text of final measure available from1:  
https://www.govinfo.gov/content/pkg/FR -2022-12-21/html/2022 -27522.htm  
https://www.govinfo.gov/content/pkg/FR -2022-12-21/pdf/2022 -27522.pdf  
https://members.wto.org/crnattachments/2023/TBT/USA/final_measure/23_0043_00_
e.pdf 
[ ] Notified measure withdrawn or revoked - date:  
Relevant sym bol if measure re -notified:   
[ ] Content or scope of notified measure changed  and text available from1:  
New deadline for comments (if applicable):   
[ ] Interpretive guidance issued and text available from1:  
[ ] Other:  
 
Description:  TITLE: Reconsideration of the 2020 National Emission Standards for Hazardous Air 
Pollutants: Miscellaneous Organic Chemical Manufacturing Residual Risk and Technology Review  
AGENCY: Environmental Protection Agency (EPA)  
ACTION: Final action; reconsideration of the final rule  
SUMMARY: On 12 August 2020, the U.S. Environmental Protection Agency (EPA ) published the final 
risk and technology review (RTR) for the Miscellaneous Organic Chemical Manufacturing NESHAP 
(2020 MON final rule) pursuant to Clean Air Act (CAA) . Subsequently, the EPA received and granted 
petitions for reconsideration on two issues, specifically, on the use of the EPA's IRIS value 
(Integrated Risk Information System ) for ethylene oxide in assessing cancer ri sk for the source 
 
1 This information can be provided by including a website address, a pdf attachment, or other 
information on where the text of the final /modified  measure and/or interpretive guidance can be obtained.  G/TBT/N/USA/1556/Add.4  
 
- 2 - 
 
  category, and the use of the Texas Commission on Environmental Quality's (TCEQ's)  risk value for 
ethylene oxide as an alternative risk value to the EPA's IRIS value for purposes of evaluating ri sk as 
part of the CAA residual risk review. On 4 February 2022, the EPA proposed the Reconsideration of 
the 2020 National Emission Standards for Hazardous Air Pollutants (NESHAP): Miscellaneous Organic 
Chemical Manufacturing Residual Risk and Technology Re view to address these two issues and 
request public comment. This action finalizes the EPA's decision to use the IRIS value for ethylene 
oxide in the risk assessment for the 2020 MON final rule and our decision to reject the use of the 
TCEQ's risk value fo r ethylene oxide as an alternative risk value to the EPA's IRIS value. As such, in 
this final action, EPA is making no changes to the risk assessment or related regulatory text for the 
miscellaneous organic chemical manufacturing source category.  
DATES: Th is final action is effective on 21 December 2022.  
This final action; reconsideration of the final rule and previous actions notified under the symbol 
G/TBT/N/USA/1556  are identified by Docket Number EPA -HQ-OAR-2018-0746. The Docket Folder is 
available on Regulations.gov at https://www.regulations.gov/docket/EPA -HQ-OAR-2018-
0746/document  and pr ovides access to primary and supporting documents as well as comments 
received. Documents are also accessible from Regulations.gov  by searching the Docket Number.  
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