Natural Attenuation

Involves “leaving the contaminated sediments in place and allowing the ongoing aquatic processes to contain, destroy, or otherwise reduce the bioavailability of the contaminants.” (NRC, 1997)

Physical, chemical or biological processes that act without human intervention to reduce the risks, toxicity, mobility, volume or concentrations of contamination (EPA)

Involves “leaving the contaminated sediments in place and allowing the ongoing aquatic processes to contain, destroy, or otherwise reduce the bioavailability of the contaminants.” (NRC, 1997)