Superfund Information Systems: Site Profile

Superfund Site:

HUDSON TECHNOLOGIES, INC.
HILLBURN, NY

Cleanup Activities

On this page:

On related pages:


Background

The Hudson Technologies Inc. (HTI) site was the location of a freon recycling facility. HTI's activities at the facility included purifying spent refrigerant and returning it to customers. HTI began operations at the site in June 1994. The site property is about 3 acres in size. It consists of a 20,500-square-foot building. In June 1995, United Water of New York (UWNY) reported to the Rockland County Department of Health (RCDH) that concentrations of trichlorofluoromethane (Freon 11) had been detected in two of its public supply wells (UWNY well Nos. 84 and 85), which are part of UWNY’s Ramapo Valley well field. In response to reports of groundwater contamination, RCDH inspected the HTI site, which is located about 500 feet from Well No. 85. During the inspection, RCDH observed that floor drains, located in HTI’s reprocessing area, were connected to a dry well west of the building. In addition, it was noted that there was a septic system on site. In July 1995, RCDH directed HTI to close off its floor drains, sump and well, and properly abandon its septic system.

On April 1, 1999, a failed connection hose to one of HTI’s outdoor storage tanks resulted in a spill of about 8,000 pounds of Ffreon 11 to the ground surface. HTI immediately started excavating soil impacted by the spill; about 400 to 500 cubic yards of contaminated soil were removed from the area. In May 1999, HTI started operation of a groundwater remediation system to treat the contaminated groundwater at the site. Analytical results in monitoring wells and public supply wells after this spill indicated that the spill had affected groundwater conditions. Two of UWNY’s supply wells were taken offline in 1999 due to Ffreon 11 contamination and pumped to waste to contain the plume and prevent distribution of contaminated ground water until an air stripping treatment system was constructed. In March 2001, construction of an air stripping treatment system was completed at the UWNY supply pumping station to treat freon contamination that has impacted the supply wells. The water supply wells in the area are routinely tested to ensure compliance with state and federal drinking water standards.

The site is being addressed through state actions. If HTI does not carry out cleanup activities, as specified in the state enforcement agreement, EPA would finalize the site on the NPL and begin the Superfund site cleanup process. EPA proposed the site for listing on the NPL in May 2000.

Facility operations and spills contaminated soil and groundwater with hazardous chemicals. The site is being addressed through state actions. If HTI does not carry out cleanup activities, as specified, in the state enforcement agreement, EPA would finalize the site on the Superfund program’s National Priorities List (NPL) and begin the Superfund site cleanup process.

Top of Page


What Has Been Done to Clean Up the Site?

The treatment systems on the HTI property and at the UWNY pumping station are treating the significant contamination in the groundwater and ensuring the distribution of a water supply that meets state and federal drinking water standards. The water supply wells in the area are routinely tested to ensure compliance with state and federal drinking water standards. As a result, the cleanup actions are currently addressing the threats to the public health and the environment posed by the HTI site. To date, the treatment system on the HTI property has treated approximately 900 million gallons of contaminated groundwater and has greatly reduced the influent concentration of Freon 11 to levels below 100 ppb. The effluent indicates that Freon 11 is being treated to below groundwater drinking water standards. 

Top of Page


What Is the Current Site Status?

The site is being addressed in one phase pursuant to an enforcement agreement with New York State, with EPA oversight.

The air stripping treatment systems on the HTI property and at the UWNY pumping station are treating the significant contamination in the groundwater and ensuring the distribution of a water supply that meets state and federal drinking water standards. As a result, the cleanup actions are currently addressing the threats to the public health and the environment posed by the HTI site. To date, the treatment system on the HTI property has treated approximately 900 million gallons of contaminated groundwater.

It is anticipated that efforts taken pursuant to the state enforcement agreement with HTI, and other voluntary actions taken by HTI, will address the threats posed by the site. EPA has been active in participating with the State and responsible parties in the remediation of the threats posed by the site.
 

Top of Page


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.

 

Currently, there are no institutional controls planned for the site.

Top of Page


Sampling and Monitoring

 

Sampling of the influent and effluent of the two air stripper’s on the HTI property are conducted quarterly by the PRP. The PRP also sample groundwater monitoring wells on a quarterly basis. The New York State Department of Environmental Conservation oversees the sampling program.

Top of Page