AOS

Alternative operating scenario (AOS) means a scenario authorized in a part 71 permit that involves a change at the part 71 source for a particular emissions unit, and that either results in the unit being subject to one or more applicable requirements which differ from those applicable to the emissions unit prior to implementation of the change or renders inapplicable one or more requirements previously applicable to the emissions unit prior to implementation of the change.

Source

40 CFR § 71.2


Scoping language

The following definitions apply to part 71. Except as specifically provided in this section, terms used in this part retain the meaning accorded them under the applicable requirements of the Act.

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