Operating day
Operating day means the period defined by the owner or operator in the Notification of Compliance Status required by 63.1417. The operating day is the period for which daily average monitoring values and batch cycle daily average monitoring values are determined.
Source
40 CFR § 63.1402
Scoping language
The following terms used in this subpart shall have the meaning given them in 63.2, 63.101, 63.111, and 63.161 as specified after each term: