Section 30.641 - Design and Operating Requirements(1) A waste pile shall have: (a) A liner that is designed, constructed and installed to prevent all migration of waste out of the pile into the adjacent groundwater, surface water, or subsurface soil at all times during the active life and during the closure period of the waste pile. The liner may be constructed of materials that may allow waste to migrate into the liner itself, but not the adjacent subsurface soil, groundwater or surface water, during the active life of the pile. The liner shall be: 1. A minimum of four feet above the probable high groundwater level as determined pursuant to 310 CMR 30.675;2. Constructed of materials that have appropriate chemical properties and sufficient strength and thickness to prevent failure due to pressure gradients including static head and external hydrogeologic forces, physical contact with the waste or leachate to which it is exposed, climatic conditions, and the stress of installation. The liner shall also be of sufficient strength and thickness to prevent failure due to puncture, cracking, tearing or other physical damage from equipment used to place waste in or on the pile or to clean and expose the liner surface for inspection.3. Placed upon a foundation or base capable of providing support to the liner and resistance to pressure gradients above and below the liner to prevent failure of the liner due to settlement, compression or uplift; rocks, boulders, irregularities with sharp edges, and all material that may damage the liner shall be removed from the subgrade prior to installation of the liner; and4. Installed to cover all surrounding earth likely to be in contact with the waste or leachate.(b) A leachate collection and removal system immediately above the liner that is designed, constructed, maintained and operated to collect and remove leachate from the pile. The leachate depth over the liner shall not exceed 30 cm (one foot) at any point. If the collected leachate is hazardous waste pursuant to 310 CMR 30.100, it shall be managed as hazardous waste in compliance with 310 CMR 30.000. If the collected leachate is discharged to surface water or groundwater, it is subject to regulation pursuant to M.G.L. c. 21, § 43. The leachate collection and removal system shall be:1. Constructed of materials that are chemically resistant to the waste managed in the pile and the leachate expected to be generated, and that are of sufficient strength and thickness to prevent collapse under the pressures exerted by overlying waste, waste cover material, and by any equipment used at the pile; and2. Designed and operated to function without clogging during the life of the pile and throughout the closure period of the pile.(2) 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 pile during peak discharge from at least a 100-year storm.(3) 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, 100-year storm. If the collected run-off is hazardous waste pursuant to 310 CMR 30.100, it shall be managed as a hazardous waste in compliance with 310 CMR 30.000. If the collected run-off is discharged to surface water or groundwater, it is subject to regulation pursuant to M.G.L. c. 21, § 43.(4) To maintain design capacity of the system, collection and holding facilities (e.g., tanks, basins) associated with run-on and run-off control systems shall be emptied or otherwise managed expeditiously after storms.(5) If the pile contains any particulate matter which may be subject to wind dispersal, the owner or operator shall cover or otherwise manage the pile to control wind dispersal.(6) Except as provided in 310 CMR 30.640(4), each owner or operator using a single-lined waste pile shall comply with 310 CMR 30.660: Groundwater Protection.