Rolf Kern Feb 23, 2010:

Bodensperrschicht Der Begriff ist tatsächlich vieldeutig. Ist es eine Sperrschicht aus Bodenmaterial oder eien Schicht ausd irgendeinem Material, die den Boden sperrt?

Bernd Runge Feb 23, 2010:

Barrier / Sperrschicht / Abdeckung Based on following little article from http://www.epa.gov/superfund/students/wastsite/soilspil.htm I'm not quite sure whether the barrier is made of soil or the barrier shall contain the soil. I would go for the latter.
"There are three general approaches to cleaning up contaminated soil:
1) soil can be excavated from the ground and be either treated or disposed;
2) soil can be left in the ground and treated in place; or
3) soil can be left in the ground and contained to prevent the contamination from becoming more widespread and reaching plants, animals, or humans.
Containment of soil in place is usually done by placing a large plastic cover over the contaminated soil to prevent direct contact and keep rain water from seeping into the soil and spreading the contamination."