NR 664.0301(3)(b)(b) The leachate collection and removal system immediately above the top liner shall be designed, constructed, operated and maintained to collect and remove leachate from the landfill during the active life and long-term care period. The department will specify design and operating conditions in the operating license to ensure that the leachate depth over the liner does not exceed 30 cm (one foot). The leachate collection and removal system shall comply with par. (c) 3. and 4. NR 664.0301(3)(c)(c) The leachate collection and removal system between the liners, and immediately above the bottom composite liner in the case of multiple leachate collection and removal systems, is also a leak detection system. This leak detection system shall be capable of detecting, collecting and removing leaks of hazardous constituents at the earliest practicable time through all areas of the top liner likely to be exposed to waste or leachate during the active life and long-term care period. The requirements for a leak detection system in this subsection are satisfied by installation of a system that is, at a minimum, all of the following: NR 664.0301(3)(c)2.2. Constructed of granular drainage materials with a hydraulic conductivity of 1´10-2 cm/sec or more and a thickness of 12 inches (30.5 cm) or more; or constructed of synthetic or geonet drainage materials with a transmissivity of 3´10-5 m2/sec or more. NR 664.0301(3)(c)3.3. Constructed of materials that are chemically resistant to the waste managed in the landfill and the leachate expected to be generated, and of sufficient strength and thickness to prevent collapse under the pressures exerted by overlying wastes, waste cover materials and equipment used at the landfill. NR 664.0301(3)(c)4.4. Designed and operated to minimize clogging during the active life and long-term care period. NR 664.0301(3)(c)5.5. Constructed with sumps and liquid removal methods (e.g., pumps) of sufficient size to collect and remove liquids from the sump and prevent liquids from backing up into the drainage layer. Each unit shall have its own sump. The design of each sump and removal system shall provide a method for measuring and recording the volume of liquids present in the sump and of liquids removed. NR 664.0301(3)(d)(d) The owner or operator shall collect and remove pumpable liquids in the leak detection system sumps to minimize the head on the bottom liner. NR 664.0301(3)(e)(e) The owner or operator of a leak detection system that is not located completely above the seasonal high water table shall demonstrate that the operation of the leak detection system will not be adversely affected by the presence of groundwater. NR 664.0301(4)(4) The department may approve alternative design or operating practices to those specified in sub. (3) if the owner or operator demonstrates to the department that the design and operating practices, together with location characteristics, will do both of the following: NR 664.0301(4)(a)(a) Prevent the migration of any hazardous constituent into the groundwater or surface water at least as effectively as the liners and leachate collection and removal systems specified in sub. (3). NR 664.0301(4)(b)(b) Allow detection of leaks of hazardous constituents through the top liner at least as effectively. NR 664.0301(5)(5) The double liner requirement in sub. (3) may be waived by the department for any monofill, if pars. (a) and (b) 1. or 2. apply: NR 664.0301(5)(a)(a) The monofill contains only hazardous wastes from foundry furnace emission controls or metal casting molding sand, and the wastes do not contain constituents which would render the wastes hazardous for reasons other than the toxicity characteristic in s. NR 661.0024, with EPA hazardous waste numbers D004 to D017. NR 664.0301(5)(b)1.a.a. The monofill has at least one liner for which there is no evidence that the liner is leaking. NR 664.0301(5)(b)1.c.c. The monofill is in compliance with generally applicable groundwater monitoring requirements for facilities with operating licenses under s. 291.25, Stats. NR 664.0301(5)(b)2.2. The owner or operator demonstrates that the monofill is located, designed and operated so as to assure that there will be no migration of any hazardous constituent into groundwater or surface water at any future time. NR 664.0301(6)(6) The owner or operator of any replacement landfill unit is exempt from sub. (3) if both of the following apply: NR 664.0301(6)(b)(b) There is no reason to believe that the liner is not functioning as designed. NR 664.0301(7)(7) The owner or operator shall design, construct, operate and maintain a run-on control system capable of preventing flow onto the active portion of the landfill during peak discharge from at least a 25-year storm. NR 664.0301(8)(8) The owner or operator shall design, construct, operate and maintain a run-off management system to collect and control at least the water volume resulting from a 24-hour, 25-year storm. NR 664.0301(9)(9) Collection and holding facilities (e.g., tanks or basins) associated with run-on and run-off control systems shall be emptied or otherwise managed expeditiously after storms to maintain design capacity of the system. NR 664.0301(10)(10) If the landfill contains any particulate matter which may be subject to wind dispersal, the owner or operator shall cover or otherwise manage the landfill to control wind dispersal. NR 664.0301(11)(11) The department shall specify in the operating license all design and operating practices that are necessary to ensure that the requirements of this section are satisfied.