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Niagara Mohawk Power Corp. (Saratoga Springs Plant)
Saratoga Springs, NY

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Larisa Romanowski - 518-747-4389
romanowski.larisa@epa.gov

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EPA added the Niagara Mohawk Power Corp. (Saratoga Springs Plant) site in the City of Saratoga Springs, New York, to the National Priorities List of Superfund sites on February 21, 1990, because various by-product materials containing hazardous substances and coal tar waste deposits were found on the site. Before Niagara Mohawk, a National Grid company, the approximately 11 acre site located in Saratoga County contained a facility used for coal gas manufacturing, a former skating rink owned by the City and portions of Spring Run Creek.

Contaminants were found in the groundwater, soil and stream sediment. Groundwater and soil contain two types of pollutants associated with coal tars. The pollutants are composed primarily of a group of compounds commonly found in motor oils and volatile organic compounds, contaminants that evaporate into the air easily. The stream sediment contains the same pollutant commonly found in motor oils and the pesticide DDT. EPA conducted a risk assessment for the site, which determines the threats posed to human health and the environment if the Superfund site were left unattended. Results showed that contaminants in three areas that flow downstream did not pose a risk to human health though may cause ecological threats. Under current conditions at this site, potential or actual human exposures are under control.

The EPA issued its first cleanup plan for the site in 1995. During the cleanup, contaminated soil and sediment were removed from areas containing coal tar waste, underground barriers were installed to contain the contaminated groundwater, a protective cap was installed to cover contaminated soil and monitoring was initiated. Additionally, a system to extract and treat contaminated groundwater was constructed and continues to operate. In all, over 68,400 tons of contaminated soil and 16,700 tons of contaminated sediment were removed from the site. This work was completed in 2002.

The EPA divided the investigation and cleanup into two phases when it discovered additional contamination at the site. The EPA's plan to address the additional contamination was proposed in February 2013. The details of the plan were discussed at a public meeting held on March 7, 2013. The EPA selected the cleanup plan for the second phase after reviewing and considering all comments submitted during the 30-day comment period.

The EPA's plan calls for the cleanup of contaminated soil and ground water discovered in a half-acre area near Excelsior, Warren and High Rock Avenues. It includes a section of Excelsior Avenue, a small green space containing the Old Red Spring well and pavilion and a section of a paved parking lot.

The EPA will solidify and stabilize contaminated areas of soil in the Old Red Spring well area with a cement-like material. Underground barriers will be installed to contain contaminated soil underneath the surface of Excelsior Avenue. Following the work, any grassy areas, plants, parking lots, roadways or sidewalks impacted during the cleanup will be restored. In addition, the contaminated ground water and soil will be treated using non-hazardous oxygen-releasing materials and nutrients to break down the contamination to meet federal and state water quality standards. The EPA will require the periodic collection and analysis of ground water samples to verify that the level and extent of the contamination is declining. The plan requires environmental easements and restrictions on land use that will prevent activities that could disturb the cleanup and prohibits the use of ground water wells, among other restrictions.


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