Non-recovery control device
Non-recovery control device means an individual unit of equipment capable of and normally used for the purpose of capturing or treating HAP emissions. Examples of equipment that may be non-recovery control devices include, but are not limited to, biofilters, caustic scrubbers, flares, thermal oxidizers, and water scrubbers.
40 CFR § 63.5610
For all affected sources complying with the batch process vent testing provisions in 63.490(c) and the operating limit provisions in 63.505(c), the terms used in this subpart and in subpart U of this part are defined in 63.482 and paragraph (g) of this section.