Always-controlled work station
Always-controlled work station means a work station associated with a dryer from which the exhaust is delivered to a control device, with no provision for the dryer exhaust to bypass the control device. Sampling lines for analyzers and relief valves needed for safety purposes are not considered bypass lines.
Source
40 CFR § 63.822
Scoping language
All terms used in this subpart that are not defined below have the meaning given to them in the CAA and in subpart A of this part.