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EPA/AR RIN: 2060-AN99 Publication ID: Spring 2009 
Title: NESHAP: Mercury Cell Chlor-Alkali Plants--Amendments 
Abstract: The existing NESHAP for mercury cell chlor-alkali plants was promulgated in 2003, in 40 CFR part 63 subpart IIIII, to require MACT for both major and area sources. The pollutant of concern is elemental mercury. At the time of the rule, 12 plants existed in the US. In 2004, NRDC submitted a petition for reconsideration requesting EPA to more accurately quantify the fugitive emissions of mercury from this industry and to set numerical standards, among other items. EPA granted NRDC's petition for reconsideration and, in response to NRDC's concerns, initiated a testing and monitoring study to evaluate and better characterize fugitive emissions from mercury cell chlor-alkali plants. The results of this study showed that the plants are emitting on the average of 500 g/day of mercury (0.2 tons per year) which is well below the previous 1,300 g/day operating value allowed in the previous part 61 rule. EPA published a proposal in June 2008, as per an agreement with NRDC, and is currently reviewing comments. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 63   
Legal Authority: 42 USC 7412   
Legal Deadline:
Action Source Description Date
Other  Judicial  Joint Stipulation  05/31/2009 
Timetable:
Action Date FR Cite
NPRM  06/11/2008  73 FR 33258   
Final Action  05/00/2009    
Additional Information: SAN No. 5095; EPA publication information: NPRM - http://www.epa.gov/fedrgstr/EPA-AIR/2008/June/Day-11/a12618.pdf; EPA Docket information: EPA–HQ– OAR–2002–0017
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Donnalee Jones
Environmental Protection Agency
Air and Radiation
D243-02,
Research Triangle Park, NC 27711
Phone:919 541-5251
Fax:919 541-3207
Email: jones.donnalee@epa.gov

Nick Hutson
Environmental Protection Agency
Air and Radiation
109 T.W. Alexander Drive, Mail Code D243-01,
Research Triangle Park, NC 27711
Phone:919 541-2968
Fax:919 541-4991
Email: hutson.nick@epa.gov