Modification in Emission of Air Pollutant Law and Legal Definition
The term "modification" is defined as any physical change in, or change in the method of operation of, a stationary source which increases the amount of any air pollutant emitted by such source or which results in the emission of any air pollutant not previously emitted. Sierra Club v. Portland GE, 2009 U.S. Dist. LEXIS 91623 (D. Or. Sept. 30, 2009)
