Monitored Natural Attenuation for Metals and Radionuclides in Groundwater

摘要

MNA can be a viable remedy, or component of a remedial alternative, for groundwater contaminated with metals and radionuclides, and may be capable of satisfying regulatory requirements at many contaminated sites. In addition, MNA may often be less costly than other, more active remedy choices. The ITRC document emphasizes that MNA is not a "do-nothing" remedy, but instead requires: 1. Potentially intense characterization to understand the attenuation processes involved, and to justify reliance on them; and 2. Regular, long-term monitoring to ensure that the attenuation processes are meeting remedial goals.