Alabama Administrative Code › Title 335 - ALABAMA DEPARTMENT OF ENVIRONMENTAL MANAGEMENT › AIR DIVISION - AIR POLLUTION CONTROL PROGRAM › Chapter 335-3-3 - OPEN BURNING AND INCINERATION › Section 335-3-3-.05 - Incineration Of Commercial And Industrial Solid Waste

Current through Register Vol. 42, No. 9, June 28, 2024
(1) Terms used but not defined in this rule are
				defined in 40 CFR
				60, Subparts A and B, and are incorporated by
				reference in ADEM Admin. Code chapter 335-3-10. For the purposes of this rule
				only, the following definitions apply:
(a)
				"
30-day rolling average
" means the arithmetic mean of
				the previous 720 hours of valid operating data. Valid data excludes periods
				when this unit is not operating. The 720 hours should be consecutive, but not
				necessarily continuous if operations are intermittent.
(b) "
Administrator
"
				means the Administrator of the U.S. Environmental Protection Agency or his/her
				authorized representative.
(c)
				"
Affirmative defense
" means, in the context of an
				enforcement proceeding, a response or defense put forward by a defendant,
				regarding which the defendant has the burden of proof, and the merits of which
				are independently and objectively evaluated in a judicial or administrative
				proceeding.
(d)
				"
Agricultural waste
" means vegetative agricultural
				materials such as nut and grain hulls and chaff (e.g., almond, walnut, peanut,
				rice, and wheat), bagasse, orchard prunings, corn stalks, coffee bean hulls and
				grounds, and other vegetative waste materials generated as a result of
				agricultural operations.
(e)
				"
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. Incinerators of this type can be constructed
				above or below ground and with or without refractory walls and floor. Air
				curtain incinerators are not to be confused with conventional combustion
				devices with enclosed fireboxes and controlled air technology such as mass
				burn, modular, and fluidized bed combustors.
(f) "
Annual heat
				input
" means the heat input for the 12 months preceding the
				compliance demonstration.
(g)
				"
Auxiliary fuel
" means natural gas, liquified
				petroleum gas, fuel oil, or diesel fuel.
(h) "
Average annual heat input
				rate
" means annual heat input divided by the hours of operation
				for the 12 months preceding the compliance demonstration.
(i) "
Bag leak detection
				system
" means an instrument that is capable of monitoring
				particulate matter loadings in the exhaust of a fabric filter (i.e., baghouse)
				in order to detect bag failures. A bag leak detection system includes, but is
				not limited to, an instrument that operates on triboelectric, light scattering,
				light transmittance, or other principle to monitor relative particulate matter
				loadings.
(j) "
Burn-off
				oven
" means any rack reclamation unit, part reclamation unit, or
				drum reclamation unit. A burn-off oven is not an incinerator, waste-burning
				kiln, an energy recover unit or a small, remote incinerator under this
				rule.
(k) "
Bypass
				stack
" means a device used for discharging combustion gases to
				avoid severe damage to the air pollution control device or other
				equipment.
(l)
				"
Calendar quarter
" means three consecutive months
				(nonoverlapping) beginning on: January 1, April 1, July 1, or October 1.
(m) "
Calendar
				year
" means 365 consecutive days starting on January 1 and ending
				on December 31.
(n)
				"
CEMS data during startup and shutdown
" means the
				following:
1. For incinerators, small remote
				incinerators: CEMS data collected during the first hours of a CISWI unit
				startup from a cold start until waste is fed into the unit and the hours of
				operation following the cessation of waste material being fed to the CISWI
				during a unit shutdown. For each startup event, the length of time that CEMS
				data may be claimed as being CEMS data during startup must be 48 operating
				hours or less. For each shutdown event, the length of time that CEMS data may
				be claimed as being CEMS data during shutdown must be 24 operating hours or
				less.
2. For energy recovery units:
				CEMS data collected during the startup or shutdown periods of operation.
				Startup begins with either the first-ever firing of fuel in a boiler or process
				heater for the purpose of supplying useful thermal energy (such as steam or
				heat) for heating, cooling or process purposes, or producing electricity, or
				the firing of fuel in a boiler or process heater for any purpose after a
				shutdown event. Startup ends four hours after when the boiler or process heater
				makes useful thermal energy (such as heat or steam) for heating, cooling, or
				process purposes, or generates electricity or when no fuel is being fed to the
				boiler or process heater, whichever is earlier. Shutdown begins when the boiler
				or process heater no longer makes useful thermal energy (such as heat or steam)
				for heating, cooling, or process purposes and/or generates electricity or when
				no fuel is being fed to the boiler or process heater, whichever is earlier.
				Shutdown ends when the boiler or process heater no longer makes useful thermal
				energy (such as steam or heat) for heating, cooling, or process purposes and/or
				generates electricity, and no fuel is being combusted in less;
3. For waste-burning kilns: CEMS data
				collected during the periods of kiln operation that do not include normal
				operations. Startup means the time from when a shutdown kiln first begins
				firing fuel until it begins producing clinker. Startup begins when a shutdown
				kiln turns on the induced draft fan and begins firing fuel in the main burner.
				Startup ends when feed is being continuously introduced into the kiln for a
				least 120 minutes or when the feed rate exceeds 60 percent of the kiln design
				limitation rate, whichever occurs first. Shutdown means the cessation of kiln
				operation. Shutdown begins when feed to the kiln is halted and ends when
				continuous kiln rotation ceases.
(o) "
Chemical recovery
				unit
" means combustion units burning materials to recover chemical
				constituents or to produce chemical compounds where there is an existing
				commercial market for such recovered chemical constituents or compounds.
A chemical recovery unit is not an incinerator, a
				  waste-burning kiln, an energy recovery unit or a small, remote incinerator
				  under this rule. The following seven types of units are considered chemical
				  recovery units:
1. Units burning only
				pulping liquors (i.e., black liquor) that are reclaimed in a pulping liquor
				recovery process and reused in the pulping process.
2. Units burning only spent sulfuric acid
				used to produce virgin sulfuric acid.
3. Units burning only wood or coal feedstock
				for the production of charcoal.
4.
				Units burning only manufacturing byproduct streams/ residue containing catalyst
				metals that are reclaimed and reused as catalysts or used to produce commercial
				grade catalysts.
5. Units burning
				only coke to produce purified carbon monoxide that is used as an intermediate
				in the production of other chemical compounds.
6. Units burning only hydrocarbon liquids or
				solids to produce hydrogen, carbon monoxide, synthesis gas, or other gases for
				use in other manufacturing processes.
7. Units burning only photographic film to
				recover silver.
(p)
				"
Chemotherapeutic waste
" means waste material
				resulting from the production or use of antineoplastic agents used for the
				purpose of stopping or reversing the growth of malignant cells.
(q) "
Clean lumber
"
				means wood or wood products that have been cut or shaped and include wet,
				air-dried, and kiln-dried wood products. Clean 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.
(r)
				"
Commercial and industrial solid waste incineration
				(CISWI)
" means any distinct operating unit of any commercial or
				industrial facility that combusts, or has combusted in the preceding 6 months,
				any solid waste as that term is defined in 40 CFR part 241 . If the operating
				unit burns material other than traditional fuels as defined in §241.2 that
				have been discarded, and the owner or operator does not keep and produce
				records as required by subparagraph (ll)(u) of this rule, the operating unit is
				a CISWI. While not all CISWIs will include all of the following components, a
				CISWI includes, but is not limited to, the solid waste feed system, grate
				system, flue gas system, waste heat recovery equipment, if any, and bottom ash
				system. The CISWI does not include air pollution control equipment or the
				stack. The CISWI boundary starts at the solid waste hopper (if applicable) and
				extends through two areas:
1. The combustion
				unit flue gas system, which ends immediately after the last combustion chamber
				or after the waste heat recovery equipment, if any; and
2. The combustion unit bottom ash system,
				which ends at the truck loading station or similar equipment that transfers the
				ash to final disposal. The CISWI unit includes all ash handling systems
				connected to the bottom ash handling system.
3. A CISWI unit does not include any of the
				types of units described in subparagraph (2)(d) of this rule, nor does it
				include any combustion turbine or reciprocating internal combustion
				engine.
(s)
				"
Contained gaseous material
" means gases that are in a
				container when that container is combusted.
(t) "
Continuous emission
				monitoring system (CEMS)
" means the total equipment that may be
				required to meet the data acquisition and availability requirements of this
				rule, used to sample, condition (if applicable), analyze, and provide a record
				of emissions.
(u)
				"
Continuous monitoring system (CMS)
" means the total
				equipment, required under the emission monitoring sections in applicable rules,
				used to sample and condition (if applicable), to analyze, and to provide a
				permanent record of emissions or process parameters. A particulate matter
				continuous parameter monitoring system (PM CPMS) is a type of CMS.
(v) "
Cyclonic burn
				barrel
" means a combustion device for waste materials that is
				attached to a 55 gallon, open-head drum. The device consists of a lid, which
				fits onto and encloses the drum, and a blower that forces combustion air into
				the drum in a cyclonic manner to enhance the mixing of waste material and air.
				A cyclonic burn barrel is not an incinerator, a waste-burning kiln, an energy
				recovery unit or a small, remote incinerator under this rule.
(w) "
Deviation
"
				means any instance in which an affected source subject to this rule, or an
				owner or operator of such a source:
1. Fails
				to meet any requirement or obligation established by this rule, including but
				not limited to any emission limitation, operating limit, or operator
				qualification and accessibility requirements;
2. Fails to meet any term or condition that
				is adopted to implement an applicable requirement in this rule and that is
				included in the operating permit for any affected source required to obtain
				such a permit.
(x)
				"
Dioxins/furans
" means tetra-through octachlorinated
				dibenzo-p-dioxins and dibenzofurans.
(y) "
Discard
" means,
				for purposes of this rule and
				40 CFR
				60, Subpart CCCC [ADEM Admin. Code r.
				335-3-10-.02(81)],
				only, burned in an incineration unit without energy recovery.
(z) "
Drum reclamation
				unit
" means a unit that burns residues out of drums (e.g., 55
				gallon drums) so that the drums can be reused.
(aa) "
Dry scrubber
"
				means an add-on air pollution control system that injects dry alkaline sorbent
				(dry injection) or sprays an alkaline sorbent (spray dryer) to react with and
				neutralize acid gas in the exhaust stream forming a dry powder material.
				Sorbent injection systems in fluidized bed boilers and process heaters are
				included in this definition. A dry scrubber is a dry control system.
(bb) "
Energy
				recovery
" means the process of recovering thermal energy from
				combustion for useful purposes such as steam generation or process
				heating.
(cc) "
Energy
				recovery unit
" means a combustion unit combusting solid waste (as
				that term is defined by the Administrator in 40 CFR part 241) for energy
				recovery. Energy recovery units include units that would be considered boilers
				and process heaters if they did not combust solid waste.
(dd) "
Energy recovery unit
				designed to burn biomass (Biomass)
" means an energy recovery unit
				that burns solid waste, biomass, and non-coal solid materials but less than 10
				percent coal, on a heat input basis on an annual average, either alone or in
				combination with liquid waste, liquid fuel or gaseous fuels.
(ee) "
Energy recovery unit
				designed to burn coal (Coal)
" means an energy recovery unit that
				burns solid waste and at least 10 percent coal on a heat input basis on an
				annual average, either alone or in combination with liquid waste, liquid fuel
				or gaseous fuels.
(ff)
				"
Energy recovery unit designed to burn liquid waste materials and
				gas (Liquid/gas)
" means an energy recovery unit that burns a
				liquid waste with liquid or gaseous fuels not combined with any solid fuel or
				waste materials.
(gg)
				"
Energy recovery unit designed to burn solid materials
				(Solids)
" includes energy recovery units designed to burn coal and
				energy recovery units designed to burn biomass.
(hh) "
Fabric filter
"
				means an add-on air pollution control device used to capture particulate matter
				by filtering gas streams through filter media, also known as a
				baghouse.
(ii) "
Foundry
				sand thermal reclamation unit
" means a type of part reclamation
				unit that removes coatings that are on foundry sand. A foundry sand thermal
				reclamation unit is not an incinerator, a waste-burning kiln, an energy
				recovery unit or a small, remote incinerator under this rule.
(jj) "
Incinerator
"
				means any furnace used in the process of combusting solid waste (as that term
				is defined by the Administrator under Resource Conservation and Recovery Act in
				40 CFR part 241) for the purpose of reducing the volume of the waste by
				removing combustible matter. Incinerator designs include single chamber and
				two-chamber.
(kk) "In-line coal
				mill" means those coal mills using kiln exhaust gases in their process. Coal
				mills with a heat source other than the kiln or coal mills using exhaust gases
				from the clinker cooler alone are not an in-line coal mill.
(ll) "In-line kiln/raw mill" means a system
				in a Portland Cement production process where dry kiln system is integrated
				with the raw mill so that all or a portion of the kiln exhaust gases are used
				to perform the drying operation of the raw mill, with no auxiliary heat source
				used. In this system the kiln is capable of operating without the raw mill
				operating, but the raw mill cannot operate without the kiln gases, and
				consequently, the raw mill does not generate a separate exhaust gas
				stream.
(mm)
				"
Kiln
" means an oven or furnace, including any
				associated preheater or precalciner devices, in-line raw mills, in-line coal
				mills or alkali bypass used for processing a substance by burning, firing or
				drying. Kilns include cement kilns that produce clinker by heating limestone
				and other materials for subsequent production of Portland Cement. Because the
				alkali bypass, in-line raw mill and in-line coal mill are considered an
				integral part of the kiln, the kiln emissions limits also apply to the exhaust
				of the alkali bypass, in-line raw mill and in-line coal mill.
(nn) "
Laboratory analysis
				unit
" means units that burn samples of materials for the purpose
				of chemical or physical analysis. A laboratory analysis unit is not an
				incinerator, waste-burning kiln, an energy recovery unit or a small, remote
				incinerator under this rule.
(oo)
				"
Load fraction
" means the actual heat input of an
				energy recovery unit divided by heat input during the performance test that
				established the minimum sorbent injection rate or minimum activated carbon
				injection rate, expressed as a fraction (e.g., for 50 percent load the load
				fraction is 0.5).
(pp)
				"
Low-level radioactive waste
" means waste material
				which contains radioactive nuclides emitting primarily beta or gamma radiation,
				or both, in concentrations or quantities that exceed applicable Federal or
				State standards for unrestricted release. Low-level radioactive waste is not
				high-level radioactive waste, spent nuclear fuel, or byproduct material as
				defined by the Atomic Energy Act of 1954 [42 U.S.C.
				2014(e)(2)].
(qq) "
Malfunction
"
				means any sudden, infrequent, and not reasonably preventable failure of air
				pollution control equipment, process equipment, or a process to operate in a
				normal or usual manner. Failures that are caused, in part, by poor maintenance
				or careless operation are not malfunctions.
(rr) "
Minimum voltage or
				amperage
" means 90 percent of the lowest test-run average voltage
				or amperage to the electrostatic precipitator measured during the most recent
				particulate matter or mercury performance test demonstrating compliance with
				the applicable emission limits.
(ss) "
Modification or modified
				CISWI
" means a CISWI that has been changed later than August 7,
				2013, and that meets one of two criteria:
1.
				The cumulative cost of the changes over the life of the unit exceeds 50 percent
				of the original cost of building and installing the CISWI (not including the
				cost of land) updated to current costs (current dollars). To determine what
				systems are within the boundary of the CISWI used to calculate these costs, see
				the definition of CISWI.
2. Any
				physical change in the CISWI unit or change in the method of operating it that
				increases the amount of any air pollutant emitted for which section 129 or
				section 111 of the Clean Air Act has established standards.
(tt) "
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/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, by hospitals
				(nonmedical), 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 (which include railroad ties and telephone poles); clean
				wood; industrial process or manufacturing wastes; medical waste; or motor
				vehicles (including motor vehicle parts or vehicle fluff).
(uu) "
Opacity
" means
				the degree to which emissions reduce the transmission of light and obscure the
				view of an object in the background.
(vv) "
Operating day
"
				means a 24-hour period between 12:00 midnight and the following midnight during
				which any amount of solid waste is combusted at any time in the
				CISWI.
(ww) "
Oxygen
				analyzer system
" means all equipment required to determine the
				oxygen content of a gas stream and used to monitor oxygen in the boiler or
				process heater flue gas, boiler/process heater, firebox, or other appropriate
				location. This definition includes oxygen trim systems and certified oxygen
				CEMS. The source owner or operator is responsible to install, calibrate,
				maintain, and operate the oxygen analyzer system in accordance with the
				manufacturer's recommendations.
(xx) "
Oxygen trim
				system
" means a system of monitors that is used to maintain excess
				air at the desired level in a combustion device over its operating range. A
				typical system consists of a flue gas oxygen and/or carbon monoxide monitor
				that automatically provides a feedback signal to the combustion air controller
				or draft controller.
(yy)
				"
Part reclamation unit
" means a unit that burns
				coatings off parts (e.g., tools, equipment) so that the parts can be
				reconditioned and reused.
(zz)
				"
Particulate matter
" means total particulate matter
				emitted from CISWIs as measured by Method 5 or Method 29 of
				40 CFR
				60, Appendix A.
(aaa) "
Pathological
				waste
" means waste material consisting of only human or animal
				remains, anatomical parts, and/or tissue, the bags/containers used to collect
				and transport the waste material, and animal bedding (if applicable).
(bbb) "
Performance
				evaluation
" means the conduct of relative accuracy testing,
				calibration error testing, and other measurements used in validating the
				continuous monitoring system data.
(ccc) "
Performance
				test
" means the collection of data resulting from the execution of
				a test method (usually three emission test runs) used to demonstrate compliance
				with a relevant emission standard as specified in the performance test section
				of the relevant standard.
(ddd)
				"
Process change
" means any of the following physical
				or operational changes:
1. A physical change
				(maintenance activities excluded) to the CISWI which may increase the emission
				rate of any air pollutant to which a standard applies;
2. An operational change to the CISWI where a
				new type of non-hazardous secondary material is being combusted;
3. A physical change (maintenance activities
				excluded) to the air pollution control devices used to comply with the emission
				limits for the CISWI (e.g., replacing an electrostatic precipitator with a
				fabric filter);
4. An operational
				change to the air pollution control devices used to comply with the emission
				limits for the affected CISWI (e.g., change in the sorbent injection rate used
				for activated carbon injection).
(eee) "
Rack reclamation
				unit
" means a unit that burns the coatings off racks used to hold
				small items for application of a coating. The unit burns the coating overspray
				off the rack so the rack can be reused.
(fff) Raw mill means a ball or tube mill,
				vertical roller mill or other size reduction equipment, that is not part of an
				in-line kiln/raw mill, used to grind feed to the appropriate size. Moisture may
				be added or removed from the feed during the grinding operation. If the raw
				mill is used to remove moisture from feed materials, it is also, by definition,
				a raw material dryer. The raw mill also includes the air separator associated
				with the raw mill.
(ggg)
				"
Reconstruction
" means rebuilding a CISWI and meeting
				two criteria:
1. The reconstruction begins on
				or after August 7, 2013.
2. The
				cumulative cost of the construction over the life of the incineration unit
				exceeds 50 percent of the original cost of building and installing the CISWI
				(not including land) updated to current costs (current dollars). To determine
				what systems are within the boundary of the CISWI used to calculate these
				costs, see the definition of CISWI.
(hhh) "
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 two fuels:
1. Low-density fluff refuse-derived fuel
				through densified refuse-derived fuel.
2. Pelletized refuse-derived fuel.
(iii) "
Responsible
				Official
" means one of the following:
1. For a corporation: a president, secretary,
				treasurer, or vice-president of the corporation in charge of a principal
				business function, or any other person who performs similar policy or
				decision-making functions for the corporation, or a duly authorized
				representative of such person if the representative is responsible for the
				overall operation of one or more manufacturing, production, or operating
				facilities applying for or subject to a permit and either:
(i) The facilities employ more than 250
				persons or have gross annual sales or expenditures exceeding $25 million (in
				second quarter 1980 dollars); or
(ii) The delegation of authority to such
				representatives is approved in advance by the Department;
2. For a partnership or sole proprietorship:
				a general partner or the proprietor, respectively;
3. For a municipality, State, Federal, or
				other public agency: Either a principal executive officer or ranking elected
				official. For the purposes of this rule, a principal executive officer of a
				Federal agency includes the chief executive officer having responsibility for
				the overall operations of a principal geographic unit of the agency (e.g., a
				Regional Administrator of EPA); or
4. For affected facilities:
(i) The designated representative in so far
				as actions, standards, requirements, or prohibitions under Title IV of the
				Clean Air Act or the regulations promulgated there under are concerned;
				or
(ii) The designated
				representative for any other purposes under 40 CFR part 60 .
(jjj)
				"
Shutdown
" means the period of time after all waste
				has been combusted in the primary chamber.
(kkk) "
Small, remote
				incinerator
" means an incinerator that combusts solid waste (as
				that term is defined by the Administrator in 40 CFR part 241) and combusts 3
				tons per day or less solid waste and is more than 25 miles driving distance to
				the nearest municipal solid waste landfill.
(lll) "
Soil treatment
				unit
" means a unit that thermally treats petroleum-contaminated
				soils for the sole purpose of site remediation. A soil treatment unit may be
				direct-fired or indirect fired. A soil treatment unit is not an incinerator, a
				waste-burning kiln, an energy recovery unit or a small, remote incinerator
				under this rule.
(mmm)
				"
Solid waste
" (as defined in
				40 CFR
				241.2) means any garbage, refuse, sludge from
				a wastewater treatment plant, water supply treatment plant, or air pollution
				control facility and other discarded material, including solid, liquid,
				semisolid, or contained gaseous material resulting from industrial, commercial,
				mining, agricultural operations, and from community activities, but does not
				include solid or dissolved materials in domestic sewage, or solid or dissolved
				materials in irrigation return flows or industrial discharges that are point
				sources subject to permit under
				33 U.S.C.
				1342, or source, special nuclear, or
				by-product material as defined by the Atomic Energy Act of 1954, as amended (68
				Stat. 923).
(nnn)
				"
Solid waste incineration unit
" means a distinct
				operating unit of any facility which combusts any solid waste (as that term is
				defined by the Administrator in 40 CFR part 241) material from commercial or
				industrial establishments or the general public (including single and multiple
				residences, hotels and motels). Such term does not include incinerators or
				other units required to have a permit under section 3005 of the Solid Waste
				Disposal Act. The term 'solid waste incineration unit" does not include:
1. Materials recovery facilities (including
				primary or secondary smelters) which combust waste for the primary purpose of
				recovering metals;
2. Qualifying
				small power production facilities, as defined in section 3(17)(C) of the
				Federal Power Act (16 U.S.C.
				769(17)(C)), or qualifying
				cogeneration facilities, as defined in section 3(18)(B) of the Federal Power
				Act (16 U.S.C.
				796(18)(B)), which burn
				homogeneous waste (such as units which burn tires or used oil, but not
				including refuse-derived fuel) for the production of electric energy or in the
				case of qualifying cogeneration facilities which burn homogeneous waste for the
				production of electric energy and steam or forms of useful energy (such as
				heat) which are used for industrial, commercial, heating or cooling purposes;
				or
3. Air curtain incinerators
				provided that such incinerators only burn wood wastes, yard wastes and clean
				lumber and that such air curtain incinerators comply with opacity limitations
				to be established by the Director by rule.
(ooo) "
Space heater
"
				means a unit that meets the requirements of
				40 CFR
				279.23. A space heater is not an incinerator,
				a waste-burning kiln, an energy recovery unit or a small, remote incinerator
				under this rule.
(ppp)
				"
Standard conditions, when referring to units of
				measure
", means a temperature of 68 deg. F (20 deg. C) and a
				pressure of 1 atmosphere (101.3 kilopascals).
(qqq) "
Startup
				period
" means the period of time between the activation of the
				system and the first charge to the unit.
(rrr) "
Waste-burning
				kiln
" means a kiln that is heated, in whole or in part, by
				combusting solid waste (as the term is defined by the Administrator in 40 CFR
				part 241). Secondary materials used in Portland cement kilns shall not be
				deemed to be combusted unless they are introduced into the flame zone in the
				hot end of the kiln or mixed with the precalciner fuel.
(sss) "
Wet scrubber
"
				means an add-on air pollution control device that uses an aqueous or alkaline
				scrubbing liquor to collect particulate matter (including nonvaporous metals
				and condensed organics) and/or to absorb and neutralize acid gases.
(ttt) "
Wood waste
"
				means untreated wood and untreated wood products, including tree stumps (whole
				or chipped), trees, tree limbs (whole or chipped), bark, sawdust, chips,
				scraps, slabs, millings, and shavings. Wood waste does not include:
1. Grass, grass clippings, bushes, shrubs,
				and clippings from bushes and shrubs from residential, commercial/retail,
				institutional, or industrial sources as part of maintaining yards or other
				private or public lands.
2.
				Construction, renovation, or demolition wastes.
3. Clean lumber.