Buffer Zone means an area designated to be left along roads or other features in which there will be no cutting.
Use Zone means the area beneath and surrounding a play structure or piece of equipment that is designated for unrestricted movement around the equipment, and onto which a child falling from or exiting the equipment could be expected to land.
Saturated zone or "zone of saturation" means that part of the earth's crust in which all voids are filled with water.
Mixing zone means a limited area of a surface water body or aquifer where initial dilution of a discharge takes place and where certain water quality standards may be exceeded.
Treatment zone means a soil area of the unsaturated zone of a land treatment unit within which hazardous constituents are degraded, transformed, or immobilized.