Acid Deposition Control and Cost Sharing Act of 1984

[AI summary unavailable — showing source text] Acid Deposition Control and Cost Sharing Act of 1984 - Amends the Clean Air Act to establish an acid deposition control and cost sharing program. Defines an "acid deposition impact region" as the 31 States east of or bordering on the Mississippi River, and the District of Columbia. Defines "existing major emitting electric powerplant" as any fossil fuel-fired steam electric power plant consisting of one or more steam generating units which: (1) is a major emitting facility; and (2) had been in commercial operation on or before December 31, 1980. Provides that steam generating units not in commercial operation on or before December 31, 1980, shall not be considered part of an existing major emitting electric powerplant. Defines "innovative emission limitation system" as a technological system of continuous emission reduction which has not been adequately demonstrated on a commercial scale and which, compared with any system which has been adequately demonstrated, has a substantial likelihood of achieving: (1) either greater continuous emission reduction of sulfur dioxide or greater simultaneous reduction of sulfur dioxide and nitrogen oxide emissions; and (2) reduction of sulfur dio…