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.
Loading Zone means a parking stall which is set aside for use by commercial vehicles if there is a sign referable to that stall marked ‘Loading Zone’;
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.
Enterprise zone means a neighborhood enterprise zone designated under the neighborhood enterprise zone act, 1992 PA 147, MCL 207.771 to 207.787.
Saturated zone or "zone of saturation" means that part of the earth's crust in which all voids are filled with water.