Superfund Information Systems: Site Profile

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About the Superfund Redevelopment Initiative

This nationally coordinated effort provides EPA and its partners with a process to return Superfund sites to productive use. Learn more at Superfund Redevelopment Initiative.

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Redevelopment at the Site

The 35-acre Nyanza Chemical Waste Dump Superfund site is located in Ashland, Massachusetts. From 1917 to 1978, companies made textile dyes, dye intermediates and other products at the site. Operators buried solid waste on site and released wastewater to a system of creeks and outfalls that discharged to nearby surface water bodies, including Eastern Wetland and the Sudbury River. Improper waste handling practices resulted in groundwater, soil, sediment and surface water contamination. Indoor air sampling from residences located downgradient from the site and above the groundwater plume showed potentially unsafe levels of vapors. EPA placed the site on the Superfund program’s National Priorities List (NPL) in 1983. Cleanup included removing sludge and contaminated soils and sediments, placing a cap over contaminated soils, and installing systems to mitigate vapors from coming into homes. Cleanup also included extensive wetland restoration. Cleanup activities are ongoing for some portions of the site. In 2013, EPA completed the cleanup design to address contamination in the Sudbury River. Based on sampling conducted in 2014, EPA plans to place a thin sand cap over an 86-acre portion of the river. Several businesses, including Nyacol Nano Technologies, Inc., continue to operate at the site.

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Economic Activity at the Site

As of December 2019, EPA had data on 7 on-site businesses. These businesses employed 43 people and generated an estimated $9,848,403 in annual sales revenue. View additional information about redevelopment economics at Superfund sites.

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Activity and Use Limitations

At this site, activity and use limitations that EPA calls institutional controls are in place. Institutional controls play an important role in site remedies because they reduce exposure to contamination by limiting land or resource use. They also guide human behavior. For instance, zoning restrictions prevent land uses – such as residential uses – that are not consistent with the level of cleanup. For more background, see Institutional Controls.

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. The site contacts should be consulted if there are questions on the ICs for this site.

The following IC Instruments provide media-specific use restrictions that have been implemented by EPA for protecting human health, the environment and remedial engineering on this site. Instruments are documents used by EPA or other organizations to implement the use restrictions at a site. To know about other media-specific use restrictions that are planned but not implemented at this site, please contact the Regional Office using the Site Contact listed above.

Click here for IC Instruments implemented for this site.

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