where:
Qi is the NMOC emission rate from the ith section in megagrams per year
k is the methane generation rate constant in year-1
Lo is the methane generation potential in cubic meters per megagram of solid waste
Mi is the mass of the degradable solid waste in the ith section in megagram
ti is the age of the solid waste in the ith section in years
CNMOC is the concentration of nonmethane organic compounds in parts per million by volume
3.6 x 10-9 is a conversion factor
NR 440.75(10)(a)4.4. When calculating emissions using the equation in subd. 3. b., the values for k and CNMOC determined in field testing shall be used if field testing has been performed in determining the NMOC emission rate or the radii of influence (the distance from the well center to a point in the landfill where the pressure gradient applied by the blower or compressor approaches zero). If field testing has not been performed, the default values for k, Lo and CNMOIC provided in sub. (5) (a) 1. or the alternative values from sub. (5) (a) 5. shall be used. The mass of nondegradable solid waste contained within the given section may be subtracted from the total mass of the section when estimating emissions provided the nature, location, age and amount of the nondegradable material is documented as provided in subd. 3. a. NR 440.75(10)(b)(b) Each owner or operator seeking to comply with sub. (3) (b) 2. a. 1) shall construct the gas collection devices using the following equipment or procedures: NR 440.75(10)(b)1.1. The landfill gas extraction components shall be constructed of polyvinyl chloride, high density polyethylene pipe, fiberglass, stainless steel or other nonporous corrosion resistant material of suitable dimensions to convey projected amounts of gases; withstand installation, static and settlement forces; and withstand planned overburden or traffic loads. The collection system shall extend as necessary to comply with emission and migration standards. Collection devices such as wells and horizontal collectors shall be perforated to allow gas entry without head loss sufficient to impair performance across the intended extent of control. Perforations shall be situated with regard to the need to prevent excessive air infiltration. NR 440.75(10)(b)2.2. Vertical wells shall be placed so as not to endanger underlying liners and shall address the occurrence of water within the landfill. Holes and trenches constructed for piped wells and horizontal collectors shall be of sufficient cross-section so as to allow for their proper construction and completion including, for example, centering of pipes and placement of gravel backfill. Collection devices shall be designed so as not to allow indirect short circuiting of air into the cover or refuse into the collection system or gas into the air. Any gravel used around pipe perforations should be of a dimension so as not to penetrate or block perforations. NR 440.75(10)(b)3.3. Collection devices may be connected to the collection header pipes below or above the landfill surface. The connector assembly shall include a positive closing throttle valve, any necessary seals and couplings, access couplings and at least one sampling port. The collection devices shall be constructed of polyvinyl chloride, high density polyethylene, fiberglass, stainless steel or other nonporous material of suitable thickness. NR 440.75(10)(c)(c) Each owner or operator seeking to comply with sub. (3) (b) 2. a. 1) shall convey the landfill gas to a control system, in compliance with sub. (3) (b) 2. c., through the collection header pipes. The gas mover equipment shall be sized to handle the maximum gas generation flow rate expected over the intended use period of the gas moving equipment using the following procedures: NR 440.75(10)(c)1.1. For existing collection systems, the flow data shall be used to project the maximum flow rate. If no flow data exists, the procedures in subd. 2. shall be used. NR 440.75 HistoryHistory: CR 06-109: cr. Register May 2008 No. 629, eff. 6-1-08; corrections in (3) (d) 2., (5) (b) 1., and (8) (e) 2. made under s. 13.92 (4) (b) 7., Stats., Register May 2008 No. 629. NR 440.76NR 440.76 Small municipal waste combustion units for which construction is commenced after August 30, 1999 or for which modification or reconstruction is commenced after June 6, 2001. This section establishes new source performance standards for new small municipal waste combustion units. Some of the requirements in this section apply during municipal waste combustion unit planning and shall be completed before construction is commenced on the municipal waste combustion unit. In particular, the preconstruction requirements in subs. (3) and (4) shall be completed prior to commencing construction. Other requirements, such as the emission limits, apply when the municipal waste combustion unit begins operation. NR 440.76 NoteNote: For purposes of this section “I”, ”my”, “you” or “your”, refers to the owner or operator of a municipal waste combustion unit or the applicant for a permit to construct a municipal waste combustion unit, unless the context indicates otherwise. (See the definitions in sub. (2) (z) and (zm).)
NR 440.76(1)(a)(a) Does this section apply to my municipal waste combustion unit? This section applies if your municipal waste combustion unit meets the following 2 criteria: NR 440.76(1)(a)1.1. Your municipal waste combustion unit is a new municipal waste combustion unit. NR 440.76(1)(a)2.2. Your municipal waste combustion unit has the capacity to combust at least 35 tons per day but no more than 250 tons per day of municipal solid waste or refuse-derived fuel. NR 440.76(1)(b)1.1. A new municipal waste combustion unit is a municipal waste combustion unit that meets either of the following 2 criteria: NR 440.76(1)(b)2.2. This section does not apply to your municipal waste combustion unit if you make physical or operational changes to an existing municipal waste combustion unit primarily to comply with the emission guidelines in subpart BBBB of 40 CFR part 60. Those changes do not qualify as reconstruction or modification under this section. NR 440.76(1)(c)1.1. ‘Small municipal waste combustion units that combust less than 11 tons per day.’ You are exempt from this section if you meet the following 4 requirements: NR 440.76(1)(c)1.a.a. Your municipal waste combustion unit is subject to a federally enforceable permit limiting the amount of municipal solid waste combusted to less than 11 tons per day. NR 440.76(1)(c)1.c.c. You provide the department with a copy of the federally enforceable permit. NR 440.76 NoteNote: If the department issued the permit you may satisfy the requirement in subd. 1.c. by providing the department with your facility identification number and the number and date of issuance of the permit which limits the amount of municipal solid waste combusted.
NR 440.76(1)(c)2.2. ‘Small power production facilities.’ You are exempt from this section if you meet the following 4 requirements: NR 440.76(1)(c)2.a.a. Your unit qualifies as a small power production facility under section 3 (17) (C) of the Federal Power Act (16 USC 796 (17) (C)). NR 440.76(1)(c)2.b.b. Your unit combusts homogeneous waste, excluding refuse-derived fuel, to produce electricity. NR 440.76(1)(c)2.d.d. You provide the department with documentation that the unit qualifies for the exemption. NR 440.76(1)(c)3.3. ‘Cogeneration facilities.’ You are exempt from this section if you meet the following 4 requirements: NR 440.76(1)(c)3.a.a. Your unit qualifies as a cogeneration facility under section 3 (18) (B) of the Federal Power Act (16 USC 796 (18) (B)). NR 440.76(1)(c)3.b.b. Your unit combusts homogeneous waste, excluding refuse-derived fuel, to produce electricity and steam or other forms of energy used for industrial, commercial, heating or cooling purposes. NR 440.76(1)(c)3.d.d. You provide the department with documentation that the unit qualifies for the exemption. NR 440.76(1)(c)4.4. ‘Municipal waste combustion units that combust only tires.’ You are exempt from this section if you meet the following 3 requirements: NR 440.76(1)(c)4.a.a. Your municipal waste combustion unit combusts a single-item waste stream of tires and no other municipal waste. However, the unit can co-fire coal, fuel oil, natural gas or other nonmunicipal solid waste. NR 440.76(1)(c)4.c.c. You provide the department with documentation that the unit qualifies for the exemption. NR 440.76(1)(c)5.5. ‘Hazardous waste combustion units.’ You are exempt from this section if you get a permit for your unit under section 3005 of the Solid Waste Disposal Act (42 USC 6925) or a license under s. 291.25, Stats. NR 440.76(1)(c)6.6. ‘Materials recovery units.’ You are exempt from this section if your unit combusts waste mainly to recover metals. Primary and secondary smelters qualify for the exemption. NR 440.76(1)(c)7.7. ‘Co-fired combustors.’ You are exempt from this section if you meet the following 4 requirements: NR 440.76(1)(c)7.a.a. Your unit has a federally enforceable permit limiting the combustion of municipal solid waste to 30% of the total fuel input by weight. NR 440.76(1)(c)7.c.c. You provide the department with a copy of the federally enforceable permit. NR 440.76 NoteNote: If the department issued the permit you may satisfy the requirement in subd. 7.c. by providing the department with your facility identification number and the number and date of issuance of the permit which limits the amount of municipal solid waste combusted.
NR 440.76(1)(c)7.d.d. You record the weights, each quarter, of municipal solid waste and of all other fuels combusted. NR 440.76(1)(c)8.8. ‘Plastics or rubber recycling units.’ You are exempt from this section if you meet the following 4 requirements: NR 440.76(1)(c)8.a.a. Your pyrolysis or combustion unit is an integrated part of a plastics or rubber recycling unit as defined in sub. (2). NR 440.76(1)(c)8.b.b. You record the weights, each quarter, of plastics, rubber and rubber tires processed. NR 440.76(1)(c)8.c.c. You record the weights, each quarter, of feed stocks produced and marketed from chemical plants and petroleum refineries. NR 440.76(1)(c)9.9. ‘Units that combust fuels made from products of plastics or rubber recycling plants.’ You are exempt from this section if you meet the following 2 requirements: NR 440.76(1)(c)9.a.a. Your unit combusts gasoline, diesel fuel, jet fuel, fuel oils, residual oil, refinery gas, petroleum coke, liquified petroleum gas, propane or butane produced by chemical plants or petroleum refineries that use feedstocks produced by plastics or rubber recycling units. NR 440.76(1)(c)10.10. ‘Cement kilns.’ You are exempt from this section if your cement kiln combusts municipal solid waste. NR 440.76(1)(c)11.11. ‘Air curtain incinerators.’ If your air curtain incinerator, as defined in sub. (2), combusts 100% yard waste, only the requirements under sub. (14) apply to you. NR 440.76(1)(d)(d) Do the new source performance standards of s. NR 440.21 also apply to my municipal waste combustion unit? If this section applies to your municipal waste combustion unit, then s. NR 440.21 does not apply to your municipal waste combustion unit. NR 440.76(1)(f)(f) How are these new source performance standards structured? These new source performance standards contain the following 5 major components: NR 440.76(1)(g)(g) Do all 5 components of these new source performance standards apply at the same time? No, you shall meet the preconstruction requirements before you commence construction of the municipal waste combustion unit. After the municipal waste combustion unit begins operation, you shall meet all of the good combustion practices, emission limits, monitoring and stack testing requirements and most recordkeeping and reporting requirements. NR 440.76(1)(h)(h) Are there different subcategories of small municipal waste combustion units within this section? NR 440.76(1)(h)1.1. Yes, this section subcategorizes small municipal waste combustion units into the following 2 groups based on the aggregate capacity of the municipal waste combustion plant as follows: NR 440.76(1)(h)1.a.a. Class I units are small municipal waste combustion units 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 of “municipal waste combustion plant capacity” in sub. (2) specifies which units at a plant are included in the aggregate capacity calculation. NR 440.76(1)(h)1.b.b. Class II units are small municipal waste combustion units 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 of “municipal waste combustion plant capacity” in sub. (2) specifies which units at a plant are included in the aggregate capacity calculation. NR 440.76(1)(h)2.2. The requirements for Class I and Class II units are identical except for the following 2 items: NR 440.76(1)(h)2.a.a. Class I units have a nitrogen oxides emission limit. As indicated in Table 1, Class II units do not have a nitrogen oxides emission limit. Additionally, Class I units have continuous emission monitoring, recordkeeping and reporting requirements for nitrogen oxides. 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:
