{"abstract":"This action finalizes the residual risk and technology review (RTR) conducted for the Miscellaneous Organic Chemical Manufacturing source category regulated under national emission standards for hazardous air pollutants (NESHAP). The U.S. Environmental Protection Agency (EPA) is finalizing decisions concerning the RTR, including amendments pursuant to the technology review for equipment leaks and heat exchange systems, and also amendments pursuant to the risk review to specifically address ethylene oxide emissions from storage tanks, process vents, and equipment leaks. In addition, we are taking final action to correct and clarify regulatory provisions related to emissions during periods of startup, shutdown, and malfunction (SSM), including removing general exemptions for periods of SSM, adding work practice standards for periods of SSM where appropriate, and clarifying regulatory provisions for certain vent control bypasses. The EPA is also taking final action to add monitoring and operational requirements for flares that control ethylene oxide emissions and flares used to control emissions from processes that produce olefins and polyolefins; add provisions for electronic reporting of performance test results and other reports; and include other technical corrections to improve consistency and clarity. We estimate that these final amendments will reduce hazardous air pollutants (HAP) emissions from this source category by approximately 107 tons per year (tpy) and reduce ethylene oxide emissions from this source category by approximately 0.76 tpy. We also estimate that these final amendments will reduce excess emissions of HAP from flares that control ethylene oxide emissions and flares used to control emissions from processes that produce olefins and polyolefins by an additional 263 tpy.","action":"Final rule.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2020/08/12/2020-12776.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"63","title":40}],"citation":"85 FR 49084","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on August 12, 2020. The incorporation by reference (IBR) of certain publications listed in the rule is approved by the Director of the Federal Register as of August 12, 2020.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2018-0746","FRL-10010-27-OAR"],"dockets":[],"document_number":"2020-12776","effective_on":"2020-08-12","end_page":49167,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2020/08/12/2020-12776.xml","html_url":"https://www.federalregister.gov/documents/2020/08/12/2020-12776/national-emission-standards-for-hazardous-air-pollutants-miscellaneous-organic-chemical","images":{"ER12AU20.001":{"large":"https://img.federalregister.gov/ER12AU20.001/ER12AU20.001_large.png","original_size":"https://img.federalregister.gov/ER12AU20.001/ER12AU20.001_original_size.png"},"ER12AU20.000":{"large":"https://img.federalregister.gov/ER12AU20.000/ER12AU20.000_large.png","original_size":"https://img.federalregister.gov/ER12AU20.000/ER12AU20.000_original_size.png"}},"images_metadata":{"ER12AU20.001":{"large":{"identifier":"ER12AU20.001","content_type":"image/png","size":2646,"width":434,"sha":"ac71cf69d8dff9a79435ba3093e0cf69","url":"https://img.federalregister.gov/ER12AU20.001/ER12AU20.001_large.png","height":47},"original_size":{"identifier":"ER12AU20.001","content_type":"image/png","size":3579,"width":1568,"sha":"f27356097ef070bc59ac560c2e2942a9","url":"https://img.federalregister.gov/ER12AU20.001/ER12AU20.001_original_size.png","height":170}},"ER12AU20.000":{"large":{"identifier":"ER12AU20.000","content_type":"image/png","size":1988,"width":310,"sha":"36c5c573985190e42bbb18c5f99d1e8b","url":"https://img.federalregister.gov/ER12AU20.000/ER12AU20.000_large.png","height":48},"original_size":{"identifier":"ER12AU20.000","content_type":"image/png","size":2273,"width":1103,"sha":"4eb9cdff2f775e443c76bd129fb77e45","url":"https://img.federalregister.gov/ER12AU20.000/ER12AU20.000_original_size.png","height":171}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2020-12776?publication_date=2020-08-12","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2020-08-12/2020-12776/mods.xml","not_received_for_publication":null,"page_length":84,"page_views":{"count":11778,"last_updated":"2026-09-22 04:15:07 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2020-08-12/pdf/2020-12776.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2020-12776.pdf?1597149913","publication_date":"2020-08-12","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2020/08/12/2020-12776.txt","regulation_id_number_info":{"2060-AT85":{"issue":"202004","html_url":"https://www.federalregister.gov/regulations/2060-AT85/national-emission-standards-for-hazardous-air-pollutants-miscellaneous-organic-chemical-manufacturin","title":"National Emission Standards for Hazardous Air Pollutants: Miscellaneous Organic Chemical Manufacturing Residual Risk and Technology Review","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202004&RIN=2060-AT85&operation=OPERATION_EXPORT_XML","priority_category":"Other Significant"}},"regulation_id_numbers":["2060-AT85"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"October 09, 2020 Petition for Reconsideration from Allen A Kacenjar on behalf of Huntsman Petrochemical LLC","document_id":"EPA-HQ-OAR-2018-0746-0261"},{"title":"October 12, 2020 Petition for Reconsideration from Texas Commission on Environmental Quality","document_id":"EPA-HQ-OAR-2018-0746-0260"},{"title":"EPA Response to Kathleen Riley and Emma Cheuse (Earthjustice) regarding the Petition for Reconsideration","document_id":"EPA-HQ-OAR-2018-0746-0252"},{"title":"EPA Response to Allen Kacenjar (representing Huntsman Petrochemical LLC) regarding the Petition for Reconsideration","document_id":"EPA-HQ-OAR-2018-0746-0251"},{"title":"EPA Response to Toby Baker (Texas Commission on Environmental Quality) regarding the Petition for Reconsideration","document_id":"EPA-HQ-OAR-2018-0746-0250"},{"title":"Risk Estimation with Epidemiologic Data When Response Attenuates at High-Exposure Levels","document_id":"EPA-HQ-OAR-2018-0746-0238"},{"title":"Screening Methodologies to Support Risk and Technology Reviews (RTR): A Case Study Analysis","document_id":"EPA-HQ-OAR-2018-0746-0237"},{"title":"Repeated Exposure To Acrolein Vapour: Subacute Studies In Hamsters, Rats And Rabbits","document_id":"EPA-HQ-OAR-2018-0746-0233"},{"title":"Inhalational Exposure to Carbonyl Sulfide Produces Altered Brainstem Auditory and Somatosensory-Evoked Potentials in Fischer 344N Rats","document_id":"EPA-HQ-OAR-2018-0746-0226"},{"title":"Science and Technology Policy Council Peer Review Handbook","document_id":"EPA-HQ-OAR-2018-0746-0221"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2060-AT85/national-emission-standards-for-hazardous-air-pollutants-miscellaneous-organic-chemical-manufacturin","title":"National Emission Standards for Hazardous Air Pollutants: Miscellaneous Organic Chemical Manufacturing Residual Risk and Technology Review"},"comments_count":31,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OAR-2018-0746","supporting_documents_count":129,"docket_id":"EPA-HQ-OAR-2018-0746","document_id":"EPA-HQ-OAR-2018-0746-0170","regulation_id_number":"2060-AT85","title":"Review of National Emission Standards for Hazardous Air Pollutants: Miscellaneous Organic Chemical Manufacturing","checked_regulationsdotgov_at":"2020-11-06T04:30:08Z"},"regulations_dot_gov_url":null,"significant":true,"signing_date":null,"start_page":49084,"subtype":null,"title":"National Emission Standards for Hazardous Air Pollutants: Miscellaneous Organic Chemical Manufacturing Residual Risk and Technology Review","toc_doc":"Miscellaneous Organic Chemical Manufacturing Residual Risk and Technology Review","toc_subject":"National Emission Standards for Hazardous Air Pollutants:\n","topics":["Administrative practice and procedure","Air pollution control","Environmental protection","Hazardous substances","Incorporation by reference","Intergovernmental relations","Reporting and recordkeeping requirements"],"type":"Rule","volume":85}