Tapping period
Tapping period means the time period commencing at the moment an EAF begins to pour molten steel and ending either three minutes after steel ceases to flow from an EAF, or six minutes after steel begins to flow, whichever is longer.
Source
40 CFR § 60.271
Scoping language
As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part.