In situ Stabilization/Solidification.

Stabilization and solidification waste treatment processes involve the mixing of specialized additives or reagents with waste materials to reduce physically or chemically the solubility or mobility of contaminants in the environmental matrix. The term stabilization is used to describe techniques that chemically modify the contaminant to form a less soluble. mobile, or toxic form without necessarily changing the physical characteristics of the waste. Solidification refers to a technique for changing the physical form of the waste to produce a solid structure in which the contaminant is mechanically trapped. Many stabilization and solidification processes overlap, and the common terminology to describe either or both processes is stabilizationsolidification SS. Goals of the application of s techniques include improving the physical and handling characteristics of liquid or semi-liquid contaminated materials, reducing contaminant solubility, and decreasing the rate of transfer of the contaminant. It is important to emphasize that typically SS does not provide for contaminant destruction and therefore may not be classified as a permanent solution.