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Electric Arc Furnaces (EAFs) and Argon-Oxygen Decarburization Vessels (AOD): New Source Performance Standards - 40 CFR 60 Subparts AA & AAa

Rule Summary

The New Source Performance Standards (NSPS) for Steel Plants: Electric Arc Furnaces and Argon Oxygen Decarburization Vessels were proposed on October 21, 1974, promulgated on September 23, 1975, and most-recently amended on February 22, 2005. These regulations regulate emissions of particulate matter and apply to existing and new facilities that produce carbon, alloy, or specialty steels: electric arc furnaces (EAFs), argon oxygen decarburization (AOD) vessels, and dust handling systems. New facilities include those that commenced construction, modification or reconstruction after the date of proposal. This information is being collected to assure compliance with 40 CFR Part 60, Subparts AA and AAa.

Rule History

02/22/2005 - Final rule; amendments (subparts AA & AAa)

10/16/2002 - Proposed rule; amendments (subparts AA & AAa)

03/02/1999 - Direct final rule; amendments to rule (subparts AA & AAa)

10/31/1984 - Final rule (subparts AA & AAa)

08/17/1983 - Proposed rule (subparts AA & AAa)

09/23/1975 - Final rule (subpart AA)

10/21/1974 - Proposed rule (subpart AA)

Additional Resources

Background Information Document

View the supporting documents in the docket folder to find additional related documents to the rules.