Superfund Site Profile
The 28-acre Sylvester Site is located in a rural residential area of Nashua, New Hampshire. A sand borrow pit operated on Site for an undetermined number of years. During the late 1960s, after the owner had removed much of the sand from the property, the owner began an illegal waste disposal operation within a 6-acre area of the Site, apparently intending to fill the excavation, resulting in soil and groundwater contamination. Following discovery of significant contamination at the Site in the early 1980s, EPA and NHDES implemented short-term actions to protect human health and the environment. The City of Nashua extended municipal water supplies to the area surrounding the Site in 1983. To address high concentrations of groundwater contamination, the EPA and NHDES designed and built one of the first groundwater pump-and-treat facilities in the country. The 300-gallon per minute pump-and-treat facility operated for ten years, recovering and destroying over 216 tons of Volatile Organic Compounds (VOCs). When operations ceased in December 1996, EPA found that the facility had removed greater than 90% of the contamination from groundwater and that the few contaminants remaining were declining in concentration. Since that time, NHDES has maintained and monitored the Site.
TOPICS IN FOCUS
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 matrix below is a general summary of the restrictions at this site at the date of this report. The information in this matrix is a general description of the restrictions at the site only. 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. Note that where multiple entries occur, it will impact more than one pathway.
Click here for IC Instruments implemented for this site. https://semspub.epa.gov/src/collection/01/SC31763
ICs are generally defined as administrative and legal tools that do not involve construction or physically changing the site. Common examples of ICs include site use and excavation restrictions put in place through State and local authorities like zoning, permits and easements. ICs are normally used when waste is left onsite and when there is a limit to the activities that can safely take place at the site (i.e., the site cannot support unlimited use and unrestricted exposure) and/or when cleanup components of the remedy remains onsite (e.g., landfill caps, pumping equipment or pipelines). Effective ICs help ensure that these sites can be returned to safe and beneficial use.
Disclaimer: This information is being provided by EPA as an informational tool to further assist the public in determining the types of restrictions that may be in place at National Priorities List sites being addressed by EPA under the Superfund program. In addition to the areas addressed by the institutional controls identified on this web site there may be other areas on the property that require restrictions on use of the property that are not captured in this EPA database. States and other entities may have implemented laws or restrictions applicable to this site. The information provided herein does not replace a title search or meet "All Appropriate Inquiry" requirements. U.S. EPA encourages users to review the Site files to obtain information regarding remedy components, containment systems and the land use for which cleanup standards were selected for these sites. More information and links can be found in the Institutional Control instrument collection of document, above, and the EPA regional offices may also be contacted.