Section 096-145-2 - DefinitionsA.Affected source. "Affected source" means an electric generating unit, resource recovery unit, fossil fuel fired boiler, or indirect heat exchanger with a maximum heat input capacity of 250 mm Btu/hour or more constructed before 1995.B.Electric generating unit. "Electric generating unit" means any fossil fuel fired combustion unit of 25 MW electric generating capacity, or greater, which provides electricity for sale or use.C.Fossil fuel. "Fossil fuel" means natural gas, petroleum, coal or any form of solid, liquid, or gaseous fuel derived wholly or in part from such material.D.Fossil fuel fired. "Fossil fuel fired" means a unit that combusts fossil fuel either alone or in combination with any other fuel, where the fossil fuel combusted comprises 51% or greater of the annual (calendar year basis) heat input on a Btu basis.E.Heat input. "Heat input" means heat derived from the combustion of fuel in an affected source and does not include the heat derived from preheated combustion air, recirculated flue gas, or exhaust from other sources.F.Indirect heat exchanger. "Indirect heat exchanger" means combustion equipment in which the flame and/or products of combustion are separated from any contact with the principal material in the process by metallic or refractory walls, which includes, but is not limited to, steam boilers, vaporizers, melting pots, heat exchangers, column reboilers, fractioning column feed preheaters, reactor feed preheaters, fuel-fired reactors such as steam hydrocarbon reformer heaters and pyrolisis heaters.G.Maximum heat input capacity. "Maximum heat input capacity" means the maximum heat value an affected source can combust on a steady-state basis as determined by the physical and operational design and characteristics of the affected source. Maximum heat input capacity is expressed in millions of British Thermal Units (MMBtu) per unit of time. Maximum heat input capacity is the product of the gross caloric value (higher heating value) of the fuel (expressed in Btu/pound or Btu/gal or Btu/scf) multiplied by the maximum fuel feed rate for the combustion device (expressed in mass of fuel/time).H.Ninety-day rolling average. "Ninety-day rolling average" or "90-day rolling average" means the total mass of emissions over a 90-day period divided by the total heat input over a 90- day period. Each day will establish a new 90-day rolling average period.I.Resource recovery unit. "Resource recovery unit" means any unit where municipal wastes are incinerated to produce usable energy.J.Selective non-catalytic reduction. "Selective non-catalytic reduction" or "SNCR" means a control technology utilizing ammonia or urea to reduce nitrogen oxides to elemental nitrogen (N2) and oxygen (O2) without the use of a catalyst.06-096 C.M.R. ch. 145, § 2