|(a) An enclosed area to be occupied by people under the natural grade of the land or under the grade of the final cover of the closed municipal solid waste (MSW) landfill will not be allowed. (b) The executive director may require that additional soil layers or building pads be placed on the final cover prior to the initiation of any construction activity or structural improvements in order to protect the integrity and function of the final cover, any liner(s), any components of the containment system(s), or any monitoring system(s). (c) The executive director may allow small amounts of solid waste removed from a closed MSW landfill (including residuals from a soil test) to be redeposited in the closed MSW landfill on a case-by-case basis. The workplan for developing land over a closed MSW landfill should describe the steps taken to ensure that removed waste will be appropriately covered or removed to an authorized waste management facility. (d) Unauthorized pilings in or through the final cover of a closed MSW landfill are prohibited. (e) Unauthorized borings or other penetrations of the final cover of a closed MSW landfill are prohibited. (f) Any water that comes in contact with waste becomes contaminated water and has to be properly discharged in a manner that will not cause surface water or groundwater contamination. (g) Locations where waste is removed shall be backfilled and compacted with clean high-plasticity or low-plasticity clay. The excavation shall be backfilled to exceed the existing grade and provide positive drainage. (h) No waste shall be left exposed overnight.