GWERD scientists have led the way in developing EPA's approach for applying and assessing monitored natural attenuation (MNA) as a cleanup tool for organic and inorganic contaminants in groundwater. MNA can work with other more active remedial tools at some sites where biogeochemical conditions favor natural processes that degrade or immobilize harmful contaminants.
The Citizen's Guide series is a set of 22 fact sheets that summarizes cleanup methods used at Superfund and other sites. Natural attenuation relies on natural processes to decrease or "attenuate" concentrations of contaminants in soil and groundwater. Scientists monitor these conditions to make sure natural attenuation is working. This document can also be accessed via the original URL.
Original URL: https://www.epa.gov/remedytech/citizens-guide-monitored-natural-attenuation
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