Section 096-138-2 - DefinitionsA.Auxiliary/Standby Boiler. "Auxiliary/Standby boiler" means a boiler that emits no more than 100 tons per year of NOx and is operated to provide steam under the following two conditions: (1) During the peak heating load periods between October 1 through April 30; and(2) During the period between May 1 and September 30 only when the primary steam or power source for a facility is not available for use.B.Kraft Recovery Boiler. "Kraft recovery boiler" means a boiler used to produce steam and to recover Kraft pulping chemicals consisting primarily of sodium and sulfur compounds by burning black liquor.C.Large Boiler. "Large boiler" means a steam generating unit that has a heat input of 1500 million BTU per hour or greater.D.Lime kiln. "Lime kiln" means a unit used to calcine lime mud, which consists primarily of oxidizing calcium carbonate, into quicklime, which is calcium oxide.E.Low NOx Burners. "Low NOx burners" means a commercially available modified combustion burner designed to minimize NOx formation through low excess air firing, controlled mixing of primary combustion air and fuel (staged air or staged fuel), reducing peak furnace temperature or other burner designs judged to be low NOx burners by the Department and EPA based on a review of evidence submitted by the subject facility.F.MgO Recovery Boiler. "MgO recovery boiler" means a boiler used to produce steam and to recover sulfite pulping chemicals consisting primarily of MgO and sulfur compounds by the burning of red liquor.G. Mid-Size Boiler. "Mid-size boiler" means a steam generating unit that has a heat input of 50 million BTU per hour or greater and less than 1500 million BTU per hour.H. Potential To Emit. "Potential to emit" means the maximum capacity of a source to emit NOx under its physical and operational design. Any physical or operational limitation on the capacity of the source to emit NOx, including air pollution control equipment, and restrictions on the hours of operation or on the type or amount of material combusted, stored, or processed, shall be treated as part of its design only if the limitation or the effect it would have on emissions is federally enforceable.I.Repowering Project Unit. "Repowering project unit" means a NOx emitting unit for which an owner or operator enters into an enforceable agreement with the Department prior to January 1, 1995 to permanently shut down, dismantle or complete a new installation project of any of its equipment by May 15, 1999.J.Small Boiler. "Small boiler" means a steam generating unit that has a heat input equal to or greater than 20 million BTU per hour and less than 50 million BTUs per hour.06- 096 C.M.R. ch. 138, § 2