Ferromanganese and Silicomanganese Production: National Emission Standards for Hazardous Air Pollutants (NESHAP)
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Rule Summary
The EPA published a final rule for the Ferroalloys Production source category included, among other things, the following:
- Emissions limits for particulate matter (PM) from stacks for the electric arc furnaces (EAF), metal oxygen refining (MOR) processes, and crushing and screening operations to minimize PM emissions from these units;
- Emission limits for: formaldehyde, hydrogen chloride, mercury, and PAH;
- Requirements to capture process fugitive emissions using effective, enhanced local capture, and duct the captured emissions to control devices;
- An average opacity limit of 8 percent during a full furnace cycle, and a maximum opacity limit of 20 percent for any two consecutive 6-minute periods, to ensure effective capture and control of process fugitive emissions;
- A requirement to conduct opacity observations using the DCOT at least once per week for a full furnace cycle for each operating furnace and each MOR operation for at least 26 weeks. After 26 weeks, if all tests are compliant, facilities can decrease to monthly opacity observations;
- A requirement to use BLDS to monitor PM emissions from all furnace baghouses; and
- A requirement to conduct periodic performance testing to demonstrate compliance with the stack emission limits for the various HAP, including a requirement to conduct PAH performance testing every 3 months for furnaces producing FeMn for the first year with the opportunity to reduce to annual testing after the first year.
Rule History
1/18/2017 - Reconsideration; final rule (pdf) (262 KB)
07/12/2016 - Reconsideration; proposed rule (248 KB)
06/30/2015 - Final rule (June 2015) (pdf) (402 KB)
12/05/2014 - Supplemental notice of proposed rulemaking; extension of public comment period (December 2014) (pdf) (209 KB)
11/14/2014 - Supplemental notice of proposed rulemaking; extension of public comment period (November 2014) (pdf) (196 KB)
10/15/2014 - Supplemental notice of proposed rulemaking; correction (pdf) (210 KB)
10/06/2014 - Supplemental notice of proposed rulemaking (pdf) (512 KB)
12/29/2011 - Proposed rule; extension of public comment period (December 2011) (pdf) (151 KB)
11/23/2011 - Proposed rule (pdf) (388 KB)
12/23/2008 - Final rule (December 2008) (pdf) (180KB)
03/22/2001 - Proposed rule; amendments (pdf) (126 KB)
03/22/2001 - Direct final rule; amendments (pdf) (151 KB)
05/20/1999 - Final rule (May 1999) (pdf) (215 KB)
02/12/1999 - Supplement to proposed rules; notice of public hearing (pdf) (166 KB)
10/13/1998 - Proposed rule; extension of public comment period (pdf) (127 KB)
08/04/1998 - Proposed rules; notice of public hearing (pdf) (295 KB)
Additional Resources
Fact Sheet - Ferroalloys Reconsideration Final Rule December 2016
Fact Sheet - Ferroalloys Reconsideration Proposal June 2016 (published 7.12.16)
Economic Impact Analysis (pdf) (849 KB)
Technical Document for Promulgation of Standards: Comment and Response Summary
Fact Sheet - Final Amendments to the Air Toxics Standards for Ferroalloys Production
Fact Sheet - Final Air Toxics Rule for Ferromanganese and Silicomanganese Production
View the supporting documents in the docket folder to find additional related documents to the rules.