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.”

NR 440.76(2)(tm)(tm) “Refractory unit” or “refractory wall furnace” means a municipal waste combustion unit that has no energy recovery, such as through a waterwall, in the furnace of the municipal waste combustion unit.

NR 440.76(2)(u)(u) “Refuse-derived fuel” means a type of municipal solid waste produced by processing municipal solid waste through shredding and size classification. This includes all classes of refuse-derived fuel including the following 2 fuels:

NR 440.76(2)(ug)(ug) “Same location” means the same or contiguous properties under common ownership or control, including those separated only by a street, road, highway or other public right-of-way. Common ownership or control includes properties that are owned, leased or operated by the same entity, parent entity, subsidiary, subdivision or any combination thereof. Entities may include a municipality, other governmental unit or any quasi-governmental authority such as a public utility district or regional authority for waste disposal.

NR 440.76(2)(ur)(ur) “Second calendar half” means the period that starts on July 1 and ends on December 31 in any year.

NR 440.76(2)(v)(v) “Shift supervisor” means the person who is in direct charge and control of operating a municipal waste combustion unit and who is responsible for onsite supervision, technical direction, management and overall performance of the municipal waste combustion unit during an assigned shift.

NR 440.76(2)(vg)(vg) “Spreader stoker, mixed fuel-fired (coal and refuse-derived fuel) combustion unit” means a municipal waste combustion unit that combusts coal and refuse-derived fuel simultaneously, in which coal is introduced to the combustion zone by a mechanism that throws the fuel onto a grate from above. Combustion takes place both in suspension and on the grate.

NR 440.76(2)(vr)(vr) “Standard conditions” when referring to units of measure means a temperature of 20°C and a pressure of 101.3 kilopascals.

NR 440.76(2)(w)(w) “Startup period” means the period when a municipal waste combustion unit begins the continuous combustion of municipal solid waste. It does not include any warmup period during which the municipal waste combustion unit combusts fossil fuel or other solid waste fuel but receives no municipal solid waste.

NR 440.76(2)(wg)(wg) “Stoker (refuse-derived fuel) combustion unit” means a steam generating unit that combusts refuse-derived fuel in a semisuspension combusting mode, using air-fed distributors.

NR 440.76(2)(wr)(wr) “Total mass dioxins/furans” or “total mass” means the total mass of tetra- to octa- chlorinated dibenzo-p-dioxins and dibenzofurans as determined using Method 23 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)(x)(x) “Twenty-four hour daily average” or “24-hour daily average” means either the arithmetic mean or geometric mean, as specified, of all hourly emission concentrations when the municipal waste combustion unit operates and combusts municipal solid waste, measured during the 24 hours between 12:00 midnight and the following midnight.

NR 440.76(2)(xm)(xm) “Untreated lumber” means wood or wood products that have been cut or shaped and includes wet, air-dried and kiln-dried wood products. Untreated lumber does not include wood products that have been painted, pigment-stained or pressure-treated by compounds such as chromate copper arsenate, pentachlorophenol and creosote.

NR 440.76(2)(y)(y) “Waterwall furnace” means a municipal waste combustion unit that has energy recovery in the furnace (for example, radiant heat transfer section) of the combustion unit.

NR 440.76(2)(ym)(ym) “Yard waste” means grass, grass clippings, bushes, shrubs and clippings from bushes and shrubs that come from residential, commercial or retail, institutional or industrial sources as part of maintaining yards or other private or public lands. Yard waste does not include the following 2 items:

NR 440.76(2)(ym)1.1. Construction, renovation and demolition wastes that are exempt from the definition of “municipal solid waste”.