handling system and providing a permanent, continuous record of carbon dioxide
emissions, in percent carbon dioxide.
(v) An oxygen monitoring system, consisting of an oxygen concentration monitor
and an automated data acquisition and handling system and providing a permanent,
continuous record of oxygen, in percent oxygen.
(o) "Electric generating unit" or "EGU" means the following:
(i) Except as provided in paragraph (ii) of this subdivision, a stationary, fossil fuel-
fired boiler or stationary, fossil fuel-fired combustion turbine serving at any time, since
the start-up of the unit's combustion chamber, a generator with nameplate capacity of
more than 25 megawatts producing electricity for sale.
(ii) For a unit that qualifies as a cogeneration unit during the 12-month period
starting on the date the unit first produces electricity and continues to qualify as a
cogeneration unit, a cogeneration unit serving at any time a generator with nameplate
capacity of more than 25 megawatts and supplying in any calendar year more than 1/3 of
the unit's potential electric output capacity or 219,000 megawatt-hour, whichever is
greater, to any utility power distribution system for sale. If a unit qualifies as a
cogeneration unit during the 12-month period starting on the date the unit first produces
electricity, but subsequently no longer qualifies as a cogeneration unit, then the unit shall
be subject to paragraph (i) of this subdivision starting on the day on which the unit first
no longer qualifies as a cogeneration unit.
(p) "Existing EGU" means an affected EGU constructed or reconstructed on or
before May 3, 2011, and is therefore not a new EGU.
(q) “Federal MATS” means the federal Mercury and Air Toxics Standards,
40 C.F.R., part 63, subpart UUUUU, “National Emission Standards for Hazardous Air
Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units” (2012), adopted
by reference in R 336.2502.
(r) "Generator" means a device that produces electricity.
(s) "Gross electric output" means electricity made available for use, including any
electricity used in the power production process, which process includes, but is not
limited to, any on-site processing or treatment of fuel combusted at the unit and any on-
site emission controls.
(t) "Heat input rate" means the amount of heat input (in million British thermal
units) divided by unit operating time (in hours) or, with regard to a specific fuel, the
amount of heat input attributed to the fuel (in million British thermal units) divided by the
unit operating time (in hours) during which the unit combusts the fuel.
(u) "Input mercury" means the amount of mercury that is contained in the coal, coal-
derived fuel, and any other fuel combusted within an electric generating unit.
(v) "Maximum design heat input" means, starting from the initial installation of a
unit, the maximum amount of fuel per hour (in Btu/hour) that a unit is capable of
combusting on a steady-state basis as specified by the manufacturer of the unit, or,
starting from the completion of any subsequent physical change in the unit resulting in a
decrease in the maximum amount of fuel per hour (in Btu per hour, Btu/hour) that a unit
is capable of combusting on a steady-state basis, such decreased maximum amount as
specified by the person conducting the physical change.
(w) "Mercury emission control" means equipment installed exclusively to decrease
the emissions of mercury from an affected EGU.