Landfill means a disposal facility or part of a facility where hazardous waste is placed in or on land and which is not a pile, a land treatment facility, a surface impoundment, an underground injection well, a salt dome formation, a salt bed formation, an underground mine, a cave, or a corrective action management unit.
Landfill cell means a discrete volume of a hazardous waste landfill which uses a liner to provide isolation of wastes from adjacent cells or wastes. Examples of landfill cells are trenches and pits.
CID means a contiguous geographic area, designated by the Council for the levying of an additional rate on rateable properties within its boundaries to finance improvements and upgrades of the district to be carried out by its management body as contemplated in section 22 of the MPRA, which may be further categorised as a Residential Improvement District, Mixed-Use Improvement District or Business Improvement District;
tailings means material rejected from a mill after most of the valuable minerals have been extracted.
Uppermost aquifer means the geologic formation nearest the natural ground surface that is an aquifer, as well as lower aquifers that are hydraulically interconnected with this aquifer within the facility's property boundary.