Contaminated Soil Gas Measurements

Contaminated soil is a problem for ground waters as well as for residential areas constructed on former industrial areas or brownfield sites. Chlorinated VOC’s in particular present significant heath problems when evaporating from contaminated land into buildings.
While actual quantitative analysis is done by taking soil samples, and analyzing these in the lab, there are still needs for quicker methods. Collecting and analyzing soil samples in the lab is very slow and expensive, and it is not possible to extensively study wide areas with this method. Therefore potentially contaminated areas are normally prescreened by drilling wells to the ground and measuring evaporating gases from these wells.

Typical soil gas components
1,1,1-Trichloroethane   CCl3CH3
Trichloroethylene (Trichlorethene) CHCl=CCl2
Tetrachloroethylene   CCl2=CCl2
Chloroform (Trichloromethane)  CHCl3

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