NR 440.76(2)(2) Definitions. All terms used in this section that are not defined in this subsection shall have the meanings given in s. NR 440.02. If the terms are not defined in s. NR 440.02, the terms shall have the meanings given in s. NR 400.02, 40 CFR part 60, subpart B or the Act. In this section: NR 440.76(2)(a)(a) “Air curtain incinerator” means an incinerator that operates by forcefully projecting a curtain of air across an open chamber or pit in which combustion occurs. Air curtain incinerators can be constructed above or below ground and with or without refractory walls and floor. NR 440.76(2)(am)(am) “Batch municipal waste combustion unit” means a municipal waste combustion unit designed so it cannot combust municipal solid waste continuously 24 hours per day because the design does not allow waste to be fed to the unit or ash to be removed during combustion. NR 440.76(2)(b)(b) “Calendar quarter” means 3 consecutive, nonoverlapping months beginning on January 1, April 1, July 1 or October 1. NR 440.76(2)(c)(c) “Chief facility operator” means the person in direct charge and control of the operation of a municipal waste combustion unit. The chief facility operator is responsible for daily onsite supervision, technical direction, management and overall performance of the municipal waste combustion unit. NR 440.76(2)(cm)(cm) “Class I units” mean small municipal waste combustion units subject to this section that are located at municipal waste combustion plants with an aggregate plant combustion capacity greater than 250 tons per day of municipal solid waste. The definition in this subsection of “municipal waste combustion plant capacity” specifies which units at a plant site are included in the aggregate capacity calculation. NR 440.76(2)(d)(d) “Class II units” mean small municipal waste combustion units subject to this section that are located at municipal waste combustion plants with an aggregate plant combustion capacity less than or equal to 250 tons per day of municipal solid waste. The definition in this subsection of “municipal waste combustion plant capacity” specifies which units at a plant site are included in the aggregate capacity calculation. NR 440.76(2)(dm)(dm) “Clean wood” means untreated wood or untreated wood products including clean untreated lumber, whole or chipped tree stumps and whole or chipped tree limbs. Clean wood does not include yard waste or construction, renovation and demolition wastes, such as railroad ties and telephone poles, that are exempt from the definition of municipal solid waste. NR 440.76(2)(e)(e) “Co-fired combustion unit” means a unit that combusts municipal solid waste with nonmunicipal solid waste fuel (e.g., coal or industrial process waste). To be considered a co-fired combustion unit, the unit shall be subject to a federally enforceable permit that limits it to combusting a fuel feed stream which is 30% or less, by weight, municipal solid waste as measured each calendar quarter. NR 440.76(2)(em)(em) “Continuous burning” means the continuous, semicontinuous or batch feeding of municipal solid waste to dispose of the waste, produce energy, or provide heat to the combustion system in preparation for waste disposal or energy production. Continuous burning does not mean the use of municipal solid waste solely to thermally protect the grate or hearth during the startup period when municipal solid waste is not fed to the grate or hearth. NR 440.76(2)(f)(f) “Continuous emission monitoring system” means a monitoring system that continuously measures the emissions of a pollutant from a municipal waste combustion unit. NR 440.76(2)(fm)(fm) “Dioxins/furans” mean tetra- to octa- chlorinated dibenzo-p-dioxins and dibenzofurans. NR 440.76(2)(g)(g) “Eight-hour block average” or “8-hour block average” means the average of all hourly emission concentrations or parameter levels when the municipal waste combustion unit operates and combusts municipal solid waste measured over any of the following 8-hour periods of time: NR 440.76(2)(gm)(gm) “Federally enforceable” means all limits and conditions the administrator can enforce, including the requirements of 40 CFR parts 60, 61 and 63, requirements in a state’s implementation plan, and any permit requirements established under ch. NR 406. NR 440.76(2)(h)(h) “First calendar half” means the period that starts on January 1 and ends on June 30 in any year. NR 440.76(2)(hm)(hm) “Fluidized bed combustion unit” means a unit where municipal waste is combusted in a fluidized bed of material. The fluidized bed material may remain in the primary combustion zone or may be carried out of the primary combustion zone and returned through a recirculation loop. NR 440.76(2)(i)(i) “Four-hour block average” or “4-hour block average” means the average of all hourly emission concentrations or parameter levels when the municipal waste combustion unit operates and combusts municipal solid waste measured over any of the following 4-hour periods: NR 440.76(2)(im)(im) “Mass burn refractory municipal waste combustion unit” means a field-erected municipal waste combustion unit that combusts municipal solid waste in a refractory wall furnace. Unless otherwise specified, municipal waste combustion units with a cylindrical rotary refractory wall furnace are included. NR 440.76(2)(j)(j) “Mass burn rotary waterwall municipal waste combustion unit” means a field-erected municipal waste combustion unit that combusts municipal solid waste in a cylindrical rotary waterwall furnace.