NR 440.75(3)(a)(a) Each owner or operator of an MSW landfill having a design capacity less than 2.5 million megagrams by mass or 2.5 million cubic meters by volume shall submit an initial design capacity report to the department as provided in sub. (8) (a). The landfill owner or operator may calculate design capacity in either megagrams or cubic meters for comparison with the exemption values. Any density conversions shall be documented and submitted with the report. Submittal of the initial design capacity report shall fulfill the requirements of this section except as follows: NR 440.75(3)(a)1.1. The owner or operator shall submit to the department an amended design capacity report, as provided for in sub. (8) (a) 3. NR 440.75(3)(a)2.2. When an increase in the maximum design capacity of a landfill results in a revised maximum design capacity equal to or greater than 2.5 million megagrams and 2.5 million cubic meters, the owner or operator shall comply with the provision of par. (b). NR 440.75(3)(b)(b) Each owner or operator of an MSW landfill having a design capacity equal to or greater than 2.5 million megagrams and 2.5 million cubic meters, shall either comply with subd. 2. or calculate an NMOC emission rate for the landfill using the procedures specified in sub. (5). The NMOC emission rate shall be recalculated annually, except as provided in sub. (8) (b) 2. The owner or operator of an MSW landfill subject to this section with a design capacity greater than or equal to 2.5 million megagrams and 2.5 million cubic meters is subject to ch. NR 407 permitting requirements. NR 440.75(3)(b)1.1. If the calculated NMOC emission rate is less than 50 megagrams per year, the owner or operator shall do the following: NR 440.75(3)(b)1.b.b. Recalculate the NMOC emission rate annually using the procedures specified in sub. (5) (a) 1. until such time as the calculated NMOC emission rate is equal to or greater than 50 megagrams per year, or the landfill is closed. 1) If the NMOC emission rate, upon recalculation, is equal to or greater than 50 megagrams per year, the owner or operator shall install a collection and control system in compliance with subd. 2.
2) If the landfill is permanently closed, a closure notification shall be submitted to the department as provided for in sub. (8) (d).
NR 440.75(3)(b)2.2. If the calculated NMOC emission rate is equal to or greater than 50 megagrams per year, the owner or operator shall do all of the following: NR 440.75(3)(b)2.a.a. Submit a collection and control system design plan prepared by a professional engineer to the department within one year. 1) The collection and control system as described in the plan shall meet the design requirements of subd. 2. b.
2) The collection and control system design plan shall include any alternatives to the operational standards, test methods, procedures, compliance measures, monitoring, recordkeeping or reporting provisions of subs. (4) to (9) proposed by the owner or operator.
3) The collection and control system design plan shall either conform with specifications for active collection systems in sub. (10) or include a demonstration to the department’s satisfaction of the sufficiency of the alternative provisions to sub. (10).
4) The department shall review the information submitted under subd. 2. a. 1) to 3) and either approve it, disapprove it, or request that additional information be submitted. Because of the many site-specific factors involved with landfill gas system design, alternative systems may be necessary. A wide variety of system designs are possible, such as vertical wells, combination horizontal and vertical collection systems, or horizontal trenches only, leachate collection components, and passive systems.
NR 440.75(3)(b)2.b.b. Install a collection and control system that captures the gas generated within the landfill within 30 months after the first annual report in which the emission rate equals or exceeds 50 megagrams per year, unless Tier 2 or Tier 3 sampling demonstrates that the emission rate is less than 50 megagrams per year, as specified in sub. (8) (c) 1. or 2. 1) An active collection system shall:
a) Be designed to handle the maximum expected gas flow rate from the entire area of the landfill that warrants control over the intended use period of the gas control or treatment system equipment.
b) Collect gas from each area, cell or group of cells in the landfill in which the initial solid waste has been placed for a period of 5 years or more if active, or 2 years or more if closed or at final grade.
c) Collect gas at a sufficient extraction rate.
d) Be designed to minimize off-site migration of subsurface gas.
2) A passive collection system shall:
a) Comply with the provisions specified in subd. 2. b. 1) a), b) and d).
b) Be installed with liners on the bottom and all sides in all areas in which gas is to be collected. The liners shall be installed as required under 40 CFR 258.40. NR 440.75(3)(b)2.c.c. Route all the collected gas to a control system that complies with one of the following: 1) An open flare designed and operated in accordance with s. NR 440.18. 2) A control system designed and operated to reduce NMOC by 98% by weight, or, when an enclosed combustion device is used for control, to either reduce NMOC by 98% by weight or reduce the outlet NMOC concentration to less than 20 parts per million by volume, dry basis as hexane at 3% oxygen. The reduction efficiency or parts per million by volume shall be established by an initial performance test to be completed no later than 180 days after the initial startup of the approved control system using the test methods specified in sub. (5) (d).
a) If a boiler or process heater is used as the control device, the landfill gas stream shall be introduced into the flame zone.
b) The control device shall be operated within the parameter ranges established during the initial or most recent performance test. The operating parameters to be monitored are specified in sub. (7).