| The report provides information on innovative long-term monitoring technologies to detect contaminant releases beneath a liner containment system and identify potential problems with the integrity of final containment covers. Several of the technologies were specifically intended for vadose zone containment monitoring, while others were designed for leak detection or moisture measurements in other industries (petroleum, chemical, agricultural, geological exploration). The report summarizes available information on these technologies and provides examples of where the technology has been used. Information in the report can be used to provide some preliminary assessment on the applicability of these technologies. |