dispersion techniques
(B) After July 8, 1985 such merging is part of a change in operation at the facility that includes the installation of pollution controls and is accompanied by a net reduction in the allowable emissions of a pollutant. This exclusion from the definition of dispersion techniques shall apply only to the emission limitation for the pollutant affected by such change in operation; or
Source
40 CFR § 51.100
Scoping language
As used in this part, all terms not defined herein will have the meaning given them in the Act: