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Glossary

A B C D E F G H I L M N O P Q R S T U V W Z

Adsorption
Adsorption is the adhesion of molecules of gas, liquid, or dissolved solids to a surface. The term also refers to a method of treating wastes in which activated carbon is used to remove organic compounds from wastewater.

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Air Sparging
In air sparging, air is injected into the ground below a contaminated area, forming bubbles that rise and carry trapped and dissolved contaminants to the surface. Air sparging is often used in conjunction with soil vapor extraction systems.

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Air Stripping
Air stripping is a treatment technology that removes or "strips" volatile organic compounds (VOC) from contaminated groundwater or surface water. As air is forced through the water, VOCs are volatilized.

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American Society for Testing and Materials (ASTM)
ASTM sets standards for many services, including methods of sampling and testing of hazardous waste and media contaminated with hazardous waste.

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Aquifer
An aquifer is an underground rock formation composed of such materials as sand, soil, or gravel that can store groundwater and supply it to wells and springs.

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Aromatics
Aromatics are organic compounds that contain 6-carbon ring structures, such as creosote, toluene, and phenol, that often are found at dry cleaning and electronic assembly sites.

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