Any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, that participate in reactions of radiant energy,… Read More »Volatile Organic Compound
Any substance that evaporates readily. — Source: Arizona Department of Environmental Quality
A measure of how far and how well an observer can see through the atmosphere. — Source: Arizona Department of Environmental Quality
The potential of the atmosphere to disperse airborne pollutants, such as smoke from a prescribed fire. It is based on both the transport winds and… Read More »Ventilation
Any agent (person, animal or microorganism) that carries and transmits an infectious pathogen into another living organism. — Source: Arizona Department of Environmental Quality
Vapor-phase migration of volatile organic compounds or volatile inorganic compounds into occupied buildings from underlying contaminated groundwater or soil. — Source: Arizona Department of Environmental… Read More »Vapor Intrusion
The gas given off by substances that are solids or liquids at ordinary atmospheric pressure and temperatures. — Source: Arizona Department of Environmental Quality
The zone between land surface and the water table within which the moisture content is less than saturation (except in the capillary fringe) and pressure… Read More »Vadose Zone
Spent motor oil from passenger cars and trucks collected at specified locations for recycling. — Source: Arizona Department of Environmental Quality
Any of the following hazardous wastes (batteries, pesticides, mercury-containing equipment and lamps) that are managed under the universal waste requirements of 40 CFR part 273.… Read More »Universal Waste
natural or man-made site that has outstanding universal value and meets at least one of 10 conditions decided by UNESCO, the United Nations Educational, Scientific… Read More »UNESCO
A tank located at least partially underground and designed to hold gasoline or other petroleum products or chemicals. — Source: Arizona Department of Environmental Quality
The program under the Safe Drinking Water Act that regulates the use of wells to pump fluids into the ground. — Source: Arizona Department of… Read More »Underground Injection Control (UIC)
A cloudy condition in water due to suspended silt or organic matter. The degree of turbidity is measured with a turbidometer. — Source: Arizona Department… Read More »Turbidity
A stable, low boiling-point colorless liquid that is toxic if inhaled. Used as a solvent or metal degreasing agent and in other industrial applications. —… Read More »Trichloroethylene (TCE)
Wastewater that has been subjected to one or more physical, chemical, and biological processes to reduce its potential of being health hazard. — Source: Arizona… Read More »Treated Wastewater
A measure of the average rate of the horizontal movement of air within the mixing layer. — Source: Arizona Department of Environmental Quality
The horizontal or vertical displacement of a pollutant from its emission source that can be carried through the atmosphere over some distance. — Source: Arizona… Read More »Transport (air pollution)
Any transportation-related facility such as loading docks, parking areas, storage areas, or other similar areas where shipments of hazardous waste are temporarily held during the… Read More »Transfer Facilities
A poisonous substance that can either be natural (produced by plants, animals or bacteria) or manufactured. — Source: Arizona Department of Environmental Quality