Common stack

Common stack means the exhaust of emissions from two or more affected units through a single flue. Affected units with a common stack may each have separate air pollution control systems located before the common stack, or may have a single air pollution control system located after the exhausts come together in a single flue.

Source

40 CFR § 63.7575

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Scoping language

Terms used in this subpart are defined in the Clean Air Act, in 63.2 (the General Provisions), and in this section as follows:

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