Superfund Site Profile
The New Brighton/Arden Hills/TCAAP site consists of the Twin Cities Army Ammunition Plant (TCAAP) and parts of surrounding communities affected by contaminants from the plant. Waste dumped at 14 locations within TCAAP between 1941 and 1981 led to soil, sediment and groundwater contamination. The site’s total area, including off-site contaminated groundwater plumes, is about 25 square miles. Following immediate actions to protect human health and the environment, site cleanup and monitoring are ongoing.