Mechanical turbulence

Mechanical Turbulence: Random irregularities of fluid motion in air caused by buildings or other nonthermal, processes.
Media: Specific environments -- air, water, soil -- which are the subject of regulatory concern and activities.

Mechanical Turbulence
The erratic movement of air or water influenced by local obstructions.
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See also: Utility, Municipal sewage, Mutagen, Mutagenicity, Most probable number