{"abstract":"This action proposes amendments to the national emission standards for hazardous air pollutants (NESHAP) for mercury emissions from mercury cell chlor-alkali plants (Mercury Cell NESHAP). On June 11, 2008, EPA proposed amendments to this NESHAP in response to a petition for reconsideration filed by the Natural Resources Defense Council (NRDC). This action is a supplement to the June 11, 2008, proposal. Specifically, this action proposes two options for amending the NESHAP for mercury emissions from mercury cell chlor-alkali plants. The first option would require the elimination of mercury emissions and thus encourage the conversion to non-mercury technology. The second option would require the measures proposed in 2008. These measures, which included significant improvements in the work practices to reduce fugitive emissions from the cell room, would result in near-zero levels of mercury emissions while still allowing the mercury cell facilities to continue to operate. We are specifically requesting comment on which of these options is more appropriate, and may finalize either option or a combination of elements from them. In addition, this action proposes several amendments that would apply regardless of which option we select. These proposed amendments are provisions of the existing NESHAP that would apply to periods of startup, shutdown, and malfunction (SSM), and corrections to compliance errors in the currently effective rule.","action":"Supplemental proposed 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/2011/03/14/2011-5530.html","cfr_references":[{"chapter":null,"citation_url":null,"part":63,"title":40}],"citation":"76 FR 13852","comment_url":null,"comments_close_on":"2011-04-13","correction_of":null,"corrections":[],"dates":"Comments must be received on or before May 13, 2011. Under the Paperwork Reduction Act, comments on the information collection provisions must be received by the Office of Management and Budget (OMB) on or before April 13, 2011.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2002-0017","FRL-9278-5"],"dockets":[],"document_number":"2011-5530","effective_on":"2011-05-13","end_page":13878,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2011/03/14/2011-5530.xml","html_url":"https://www.federalregister.gov/documents/2011/03/14/2011-5530/national-emission-standards-for-hazardous-air-pollutants-mercury-emissions-from-mercury-cell","images":{"EP14MR11.000":{"large":"https://img.federalregister.gov/EP14MR11.000/EP14MR11.000_large.png","medium":"https://img.federalregister.gov/EP14MR11.000/EP14MR11.000_medium.png","original_size":"https://img.federalregister.gov/EP14MR11.000/EP14MR11.000_original_size.png"},"EP14MR11.001":{"large":"https://img.federalregister.gov/EP14MR11.001/EP14MR11.001_large.png","medium":"https://img.federalregister.gov/EP14MR11.001/EP14MR11.001_medium.png","original_size":"https://img.federalregister.gov/EP14MR11.001/EP14MR11.001_original_size.png"}},"images_metadata":{"EP14MR11.000":{"large":{"identifier":"EP14MR11.000","content_type":"image/png","size":117640,"width":823,"sha":"9a08eb5297327ddc3a1a0fe81e1aeb02","url":"https://img.federalregister.gov/EP14MR11.000/EP14MR11.000_large.png","height":1205},"medium":{"identifier":"EP14MR11.000","content_type":"image/png","size":64362,"width":538,"sha":"6d224c594e37ffad1137c50130e7935f","url":"https://img.federalregister.gov/EP14MR11.000/EP14MR11.000_medium.png","height":788},"original_size":{"identifier":"EP14MR11.000","content_type":"image/png","size":213521,"width":4056,"sha":"3714f6d1e3da62e98897242f2ed57191","url":"https://img.federalregister.gov/EP14MR11.000/EP14MR11.000_original_size.png","height":5938}},"EP14MR11.001":{"large":{"identifier":"EP14MR11.001","content_type":"image/png","size":50356,"width":822,"sha":"80cab4ba9af4447ee62118ca174c02fb","url":"https://img.federalregister.gov/EP14MR11.001/EP14MR11.001_large.png","height":802},"medium":{"identifier":"EP14MR11.001","content_type":"image/png","size":27435,"width":531,"sha":"612c9879f67432a22f110b4b8cafe636","url":"https://img.federalregister.gov/EP14MR11.001/EP14MR11.001_medium.png","height":518},"original_size":{"identifier":"EP14MR11.001","content_type":"image/png","size":79789,"width":4008,"sha":"42d4e7fa92d8367652559854e40bb36c","url":"https://img.federalregister.gov/EP14MR11.001/EP14MR11.001_original_size.png","height":3912}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2011-5530?publication_date=2011-03-14","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2011-03-14/2011-5530/mods.xml","not_received_for_publication":null,"page_length":27,"page_views":{"count":1013,"last_updated":"2026-08-25 14:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2011-03-14/pdf/2011-5530.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2011-03-14","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2011/03/14/2011-5530.txt","regulation_id_number_info":{"2060-AN99":{"issue":"201110","html_url":"https://www.federalregister.gov/regulations/2060-AN99/neshap-mercury-cell-chlor-alkali-plants-amendments","title":"NESHAP: Mercury Cell Chlor-Alkali Plants--Amendments","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201110&RIN=2060-AN99&operation=OPERATION_EXPORT_XML","priority_category":"Other Significant"}},"regulation_id_numbers":["2060-AN99"],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-04-02T08:04:50Z"},"regulations_dot_gov_url":null,"significant":true,"signing_date":null,"start_page":13852,"subtype":null,"title":"National Emission Standards for Hazardous Air Pollutants: Mercury Emissions From Mercury Cell Chlor-Alkali Plants","toc_doc":"Mercury Emissions from Mercury Cell Chlor-Alkali Plants","toc_subject":"National Emission Standards for Hazardous Air Pollutants:","topics":["Air pollution control","Environmental protection","Hazardous substances","Incorporation by reference","Reporting and recordkeeping requirements"],"type":"Proposed Rule","volume":76}