NR 440.76(2)(L)(L) “Maximum demonstrated temperature of the particulate matter control device” means the highest 4-hour block arithmetic average flue gas temperature measured at the inlet of the particulate matter control device during 4 consecutive hours in the course of the most recent stack test for dioxins/furans emissions that demonstrates compliance with the limits specified in this section. NR 440.76(2)(m)(m) “Mixed fuel-fired (pulverized coal and refuse-derived fuel) combustion unit” means a combustion unit that combusts coal and refuse-derived fuel simultaneously, in which pulverized coal is introduced into an air stream that carries the coal to the combustion chamber of the unit where it is combusted in suspension. This includes both conventional pulverized coal and micropulverized coal. NR 440.76(2)(mm)(mm) “Modification” or “modified municipal waste combustion unit” means a municipal waste combustion unit you have changed after June 6, 2001 and that meets one of the 2 following criteria: NR 440.76(2)(mm)1.1. The cumulative cost of the changes over the life of the unit exceeds 50% of the original cost of building and installing the unit, not including the cost of land, updated to current costs. NR 440.76(2)(mm)2.2. Any physical change in the municipal waste combustion unit or change in the method of operating it that increases the emission level of any air pollutant for which new source performance standards have been established under section 129 or section 111 of the Act (42 USC 7429 or 7411). Increases in the emission level of any air pollutant shall be determined when the municipal waste combustion unit operates at 100% of its physical load capability and shall be measured downstream of all air pollution control devices. Load restrictions based on permits or other nonphysical operational restrictions may not be considered in the determination. NR 440.76(2)(n)(n) “Modular excess-air municipal waste combustion unit” means a municipal waste combustion unit that combusts municipal solid waste, is not field-erected, and has multiple combustion chambers, all of which are designed to operate at conditions with combustion air amounts in excess of theoretical air requirements. NR 440.76(2)(nm)(nm) “Modular starved-air municipal waste combustion unit” means a municipal waste combustion unit that combusts municipal solid waste, is not field-erected, and has multiple combustion chambers in which the primary combustion chamber is designed to operate at substoichiometric conditions. NR 440.76(2)(o)(o) “Municipal solid waste” or “municipal-type solid waste” means household, commercial, retail or institutional waste. Household waste includes material discarded by residential dwellings, hotels, motels and other similar permanent or temporary housing. Commercial or retail waste includes material discarded by stores, offices, restaurants, warehouses, nonmanufacturing activities at industrial facilities and other similar establishments or facilities. Institutional waste includes materials discarded by schools, nonmedical materials discarded by hospitals, materials discarded by nonmanufacturing activities at prisons and government facilities, and other similar establishments or facilities. Household, commercial, retail and institutional waste does include yard waste and refuse-derived fuel. Household, commercial, retail and institutional waste does not include used oil; sewage sludge; wood pallets; construction, renovation and demolition wastes, such as railroad ties and telephone poles; clean wood; industrial process or manufacturing wastes; medical waste; or motor vehicles, including motor vehicle parts or vehicle fluff. NR 440.76(2)(om)(om) “Municipal waste combustion plant” means one or more municipal waste combustion units at the same location as specified under sub. (1) (b) 1. and 2. NR 440.76(2)(p)(p) “Municipal waste combustion plant capacity” means the aggregate municipal waste combustion capacity of all municipal waste combustion units at the plant that are subject to s. NR 440.215 or 440.216 or this section. NR 440.76(2)(pm)(pm) “Municipal waste combustion unit” means any setting or equipment that combusts solid, liquid or gasified municipal solid waste. The term “municipal waste combustion unit” includes field-erected combustion units with or without heat recovery; modular combustion units with starved-air or excess-air; boilers such as steam generating units; furnaces, whether suspension-fired, grate-fired, mass-fired, air curtain incinerators or fluidized bed-fired; and pyrolysis or combustion units. The following 2 criteria further define municipal waste combustion units: NR 440.76(2)(pm)1.1. Municipal waste combustion units do not include pyrolysis or combustion units located at a plastics or rubber recycling unit as specified under sub. (1) (c) 8. and 9. Municipal waste combustion units also do not include cement kilns that combust municipal solid waste as specified under sub. (1) (c) 10. Municipal waste combustion units also do not include internal combustion engines, gas turbines or other combustion devices that combust landfill gases collected by landfill gas collection systems. NR 440.76(2)(pm)2.2. The municipal waste combustion unit includes the municipal solid waste fuel feed system, grate system, flue gas system, bottom ash system and the combustion unit water system. The municipal waste combustion unit does not include air pollution control equipment, the stack, water treatment equipment or the turbine-generator set. The municipal waste combustion unit starts at the municipal solid waste pit or hopper and extends through the following 3 areas: NR 440.76(2)(pm)2.a.a. The combustion unit flue gas system, which ends immediately after the heat recovery equipment or, if there is no heat recovery equipment, immediately after the combustion chamber. NR 440.76(2)(pm)2.b.b. The combustion unit bottom ash system, which ends at the truck loading station or similar equipment that transfers the ash to final disposal. It includes all ash handling systems connected to the bottom ash handling system. NR 440.76(2)(pm)2.c.c. The combustion unit water system, which starts at the feed water pump and ends at the piping that exits the steam drum or superheater. NR 440.76(2)(q)(q) “Particulate matter” means total particulate matter emitted from municipal waste combustion units as measured using Method 5 in Appendix A of 40 CFR part 60, incorporated by reference in s. NR 440.17 (1), and the procedures specified in sub. (10) (d). NR 440.76(2)(qm)(qm) “Plastics or rubber recycling unit” means an integrated processing unit for which plastics, rubber or rubber tires are the only feed materials. Incidental contaminants may be in the feed materials. The feed materials are processed and marketed to become input feed stock for chemical plants or petroleum refineries. The following 3 criteria further define a plastics or rubber recycling unit: NR 440.76(2)(qm)1.1. Each calendar quarter, the combined weight of the feed stock that a plastics or rubber recycling unit produces shall be more than 70% of the combined weight of the plastics, rubber and rubber tires that the recycling unit processes. NR 440.76(2)(qm)2.2. The plastics, rubber or rubber tires fed to the recycling unit may originate from separating or diverting plastics, rubber or rubber tires from municipal or industrial solid waste. The feed materials may include manufacturing scraps, trimmings, and off-specification plastics, rubber and rubber tire discards. NR 440.76(2)(qm)3.3. The plastics, rubber and rubber tires fed to the recycling unit may contain incidental contaminants such as paper labels on plastic bottles or metal rings on plastic bottle caps. NR 440.76(2)(r)(r) “Potential hydrogen chloride emissions” means the level of hydrogen chloride emissions from a municipal waste combustion unit that would occur from combusting municipal solid waste without emission controls for acid gases. NR 440.76(2)(rm)(rm) “Potential mercury emissions” means the level of mercury emissions from a municipal waste combustion unit that would occur from combusting municipal solid waste without controls for mercury emissions. NR 440.76(2)(s)(s) “Potential sulfur dioxide emissions” means the level of sulfur dioxide emissions from a municipal waste combustion unit that would occur from combusting municipal solid waste without emission controls for acid gases. NR 440.76(2)(sm)(sm) “Pyrolysis or combustion unit” means a unit that produces gases, liquids or solids by heating municipal solid waste. The gases, liquids or solids produced are combusted and the emissions vented to the atmosphere. NR 440.76(2)(t)(t) “Reconstruction” means rebuilding a municipal waste combustion unit and meeting the following 2 criteria: NR 440.76(2)(t)2.2. The cumulative cost of the construction over the life of the unit exceeds 50% of the original cost of building and installing the municipal waste combustion unit, not including land, updated to current costs in dollars. To determine what systems are within the boundary of the municipal waste combustion unit used to calculate those costs, see the definition in this subsection of “municipal waste combustion unit.”