[Welcome Page]
Tell a friend about the Tech Tree!

Home Pages


The follow definitions are used in the description of the cleanup technologies

Skip to Words:
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z


Sanborn mapA record kept for insurance purposes that shows, for a specific property, the locations of such items as underground storage tanks (UST), buildings, and areas where chemicals have been used for certain industrial processes.
saturated zoneThe area beneath the surface of the land in which all pore space is filled with water at greater than atmospheric pressure.
semi-volatile organic compounds (SVOCs)Substances composed primarily of carbon and hydrogen atoms that have boiling points greater than 200( C. Common SVOCs include PCBs and PAHs.
sludgeA semisolid residue from air or water treatment processes.
slurryA liquid or emulsion that can be used to deliver chemicals and biological agents to a medium; or, a liquid that is injected into the ground and hardens, preventing the flow of water. See technology descriptions of Slurry Walls and Impermeable Barriers and Bio-Slurry.
soil boringA process by which a soil sample is extracted from the ground for analytical testing.
soil gasGaseous elements and compounds that occur in the small spaces between particles.
soil washingSoil washing is a treatment technology that uses liquids (usually water, sometimes combined with chemical additives) and a mechanical process to removes hazardous contaminants from soil. See technology description of Soil Washing.
solidification and stabilizationThe processes of solidifying and stabilizing wastes to immobilize them. See technology description of Solidification/ Stabilization.
solute A substance dissolved in another substance, usually, the component of a solution present in the lesser amount.
solvent extractionA technology that uses a solvent to separate or remove hazardous contaminants from soil. See technology description of Chemical_Extraction.
solventA substance, usually liquid, that is capable of dissolving another substance to form a solution.
sorptionA term describing adherence of chemical substances to particles. It includes either absorption or adsorption.
spargeTo introduce air or gas into a liquid and thereby agitate it.
stratigraphyDescription of major and minor divisions of surface and subsurface geologic formations.
sumpA basin at the lowest point of a drainage system into which water drains in order to be pumped out.
SuperfundThe common name used for CERCLA. Sites listed on the NPL are called Superfund sites.
surface waterAll water naturally open to the atmosphere, such as rivers, lakes, reservoirs, streams, and seas.
surfactantSurfactants are surface-active agents, and are the primary ingredient in soap and detergent. See technology description of Surfactant Enhanced Recovery.
syntheticDescribing that which is made by synthesis, esp. no of natural origin.

Note: A majority of the terms and definitions are based on the U.S. Environmental Protection Agency's Brownfields Innovative Technology Glossary . Some definitions have been modified/enhanced to support the Tech Tree text.

Skip to Words:
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

This page was last updated OCTOBER 26, 1998
Please E-mail comments/questions about the Tech Tree to: