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EPA Announces Final Cleanup Plan for the Nyanza Chemical Waste Dump Superfund Site in Ashland, Massachusetts

On July 30, 2020 the U.S. Environmental Protection Agency (EPA), in consultation with the State of Massachusetts, has selected a final plan to cleanup groundwater contamination at the Nyanza Chemical Waste Dump Superfund Site, Operable Unit 2, located in Ashland.

The selected remedy is intended to reduce the concentration of contaminants in groundwater to levels that will be protective of human health for exposure to indoor air, such that the existing vapor mitigation systems are no longer needed, and to minimize the need for controls to protect Read full press release.

Read the RECORD OF DECISION (ROD), 7/30/20 (124 pp, 14.3 MN, About PDF)

View the complete Administrative Record File.

Read the Responsiveness Summary (13 pp, 888 K, About PDFto comments on the Proposed Plan received during the public comment period.








Five Year Review

On May 21, 2019 the EPA completed the sixth Five Year Review for the site.

Institutional controls are required for this site.  

This site requires ICs because a decision document, such as a Record of Decision, has documented some level of contamination and/or remedy component at the site that would restrict use of the site. These ICs are required to help ensure the site is used in an appropriate way and that activities at the site do not damage the cleanup components. These ICs will remain in place for as long as the contamination and/or cleanup components stay on site.  In order to determine the current status of ICs for this site, the site contacts should be consulted. 

 More information about institutional controls at this site.   

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