| Site Type: Long Term/National Priorities List (NPL) |
NUTMEG VALLEY ROAD
Map this site in Cleanups in My Community
| Wolcott,  Connecticut|
| New Haven County
| Street Address: ||Nutmeg Valley Road |
| Zip Code: || 06716 |
| Congressional |
| EPA ID #: ||CTD980669261 |
| Site ID #: ||0100250 |
| Site Aliases: ||Nutmeg Screw Machine , Products, Inc.|
| Site Responsibility: ||Federal, State |
| NPL LISTING HISTORY |
| Proposed Date ||01/22/1987|
| Final Date ||03/31/1989 |
|  Deleted Date ||09/23/2005 |
The investigation of the Nutmeg Valley Road site centered around Nutmeg Screw Machine Products Company, which covers 3 acres on Nutmeg Valley Road. The area around the site is both rural residential and light industrial, with several other metal-working and metal-finishing shops in the immediate vicinity, including Waterbury Heat Treating Corporation and Alpine Electronic Components, Inc. Some substances used in the machining processes like kerosene-like cutting oil, machine lubrication oils, cyanide wastes, and agents used for cleaning and degreasing, such as carbon tetrachloride, were dumped onto the ground at an estimated rate of as much as 15 gallons a day until 1980. Evidence suggests that other companies in the area had similar disposal practices. Approximately 10,500 people draw drinking water from private wells located within 3 miles of the site. There are approximately 43 industries and 25 residences using groundwater as a drinking water source at this site. The Towns of Waterbury, with a population of approximately 103,800, and Wolcott, with a population of approximately 13,200, lie within 3 miles of the site
Threats and Contaminants
Groundwater from industrial wells in the area were found to be contaminated with volatile organic compounds (VOCs), heavy metals, and cyanide. The soil was also found to be contaminated with VOCs and heavy metals including lead and copper. The potential primary health threats to area residents were from accidental ingestion of or direct contact with contaminated water or soil.
The site was addressed in stages: immediate actions, an emergency removal and a long-term remedial phase which focused on cleanup of the entire site.
Response Action Status
|Immediate Actions ||The State of Connecticut supplied bottled drinking water to affected residents. Also, carbon filters have been installed on the industrial wells to reduce contamination levels. Interim measures have included the extension of public water supplies to the area, removal of some contaminated soil from a lagoon on site, and monitoring. |
|Entire Site: ||In 1997, the U.S. Geological Survey (USGS) released a report entitled Preliminary Hydrogeologic Assessment of a Ground-Water Contamination Area in Wolcott Connecticut. The report stated that the levels of volatile organic compounds in the groundwater appeared to be decreasing. In July and August of 1998, the Chesprocott Health District sampled 34 residential wells used for drinking water. All the wells sampled met the requirements of the Safe Drinking Water Act and were considered safe for drinking. During the summer of 1998, the USGS began Phase II of its investigation and released a final report in 1999 entitled Hydrology and Water Quality of the Nutmeg Valley Area, Wolcott and Waterbury, Connecticut. This second report can be viewed by clicking on the USGS web page link listed below. Based on these results, the EPA and Connecticut Department of Environmental Protection agreed that an additional study was needed to determine what risks, if any, continued to be present at the site. In November 2000 and June 2001, EPA collected soil and groundwater samples from and around Nutmeg Screw Machine Products Company, Alpine Electronic Components, and the former Waterbury Heat Treating facility, and, surface water and sediment samples from various stream locations on Old Tannery Brook and its unnamed tributary. EPA used the soil and groundwater data to perform human-health and ecological risk assessments. |
The results of the ecological risk assessment concluded that there are risks to aquatic plants and animals that live in Old Tannery Brook and its unnamed tributary. However, the risks found upstream of the study area are the same or even greater, which suggests that past industrial activities in the study area do not appear to contribute significantly to ecological risk. Other possible sources of this risk both upstream and within the study area are run-off from roads, parking lots and lawns treated with chemicals. Sources like landfills and septic systems can also contaminate groundwater, which can carry these pollutants to surface water.
For the human-health risk assessment, EPA looked at current and future risks to nearby residents, adolescent trespassers, commercial workers and construction workers from the chemicals detected in soil, surface water, sediment and groundwater samples taken in the study area. Both carcinogenic and non-carcinogenic health effects were evaluated. The risk assessment did not reveal any unacceptable cancer risks. Adverse non-carcinogenic health effects, however, are possible from consumption of groundwater from the overburden (i.e., shallow) aquifer. EPA concluded that the risk is a future one, since currently no one is drinking the groundwater in those areas where concentrations exceed drinking water standards. The primary contributor to this risk is manganese.
|Emergency Response ||In 1992, EPA conducted an emergency removal at the PAR Finishing facility on Tosun Road. Approximately 1,150 tons of sludge waste and contaminated soil were removed from two unlined lagoons and shipped to a disposal facility in Michigan. This action addressed the threats posed by electroplating wastes in surface soils, and removed a potential point source of groundwater contamination. |
|Smaller Study Area Defined ||Based on the results of the ecological and human-health risk assessments, EPA narrowed the focus of future investigations to an area roughly the shape of a triangle that is bounded by Wolcott Road to the northwest, Old Tannery Brook to the east, and its unnamed tributary to the south. |
|Groundwater Ordinance ||In spring 2004, the Town of Wolcott adopted an ordinance restricting all uses of groundwater on site and requiring that all existing groundwater wells be formally abandoned. In a letter dated July 12, 2005, Thomas G. Dunn, Mayor of Wolcott, certified that all affected property owners had abandoned the groundwater wells on their properties and had connected to the public water supply. |
|First Five-Year Review ||EPA conducted the first (discretionary) five-year review in 2009. The review was limited in scope to evaluating whether legal mechanisms which at the time of the Record of Decision prevented exposure to groundwater that poses a potential risk to human health remain in place and sufficient. EPA made the determination that the remedy is currently protective. Groundwater samples will be collected for the next five-year review to confirm future protectiveness. |
|Second Five-Year Review ||The second five-year review is scheduled for 2014. |
The initial actions described above provided safe drinking water to affected residents and reduced contamination levels in the industrial water supply, limiting the threat of exposure while the investigation to determine the nature and extent of contamination was conducted. Electroplating sludges and wastes were removed from two unlined lagoons on Tosun Road. No further remedial actions were determined to be necessary at this site. The Site Reuse Profile issued in September 2005 (available as a link below) is intended to provide prospective purchasers and financial institutions with the information needed to access the redevelopment potential of the site.
Current Site Status
This site consists of an industrial park which includes mostly light industry. The risk assessment showed that there is the potential for non-carcinogenic effects from the future use of groundwater for drinking. EPA made the determination that the groundwater ordinance, adopted by the Town of Wolcott in 2004, when considered with existing Connecticut Public Health Code which would restrict the ability for landowners in the site to receive permits for new drinking water wells, is adequate and will provide a sufficient mechanism ensuring that human exposure to contaminated groundwater is prevented. EPA proposed a No Further Action remedy in July 2004. The public comment period ran from July 9 to August 9, 2004. EPA issued a Record of Decision (ROD) in September 2004.
Because all appropriate cleanup actions have been completed and the site no longer poses a threat to human health or the environment, EPA published a notice of intent to delete the Nutmeg Valley Road site in the Federal Register on August 5, 2005, and sought public comment between August 5 and September 9, 2005. No public comments opposed the delisting and the site was removed from the National Priorities List (NPL) on September 23, 2005.
Sites deleted from the NPL remain eligible for remedial actions in the unlikely event that conditions at the site change and warrant such action in the future. Because EPA's determination of no further action relies in part on existing laws already in place, EPA will review the protectiveness of this determination every five years. These reviews will be limited in scope to evaluating whether or not these legal mechanisms (or similar requirements) currently in place remain in place, and whether or not these mechanisms function sufficiently to prevent human exposure to contaminated groundwater. Should a review indicate that exposure is occurring, then EPA may take additional action to determine if such exposure presents an unacceptable risk. EPA conducted the first five-year review in 2009 and made the determination that the remedy remains protective. Groundwater sampling will be conducted for the second five-year review in 2014 to confirm future protectiveness.
EPA's determination of no further action and the subsequent delisting has no bearing on Connecticut's Property Transfer Law. Under state law, if a property meets the definition of "establishment" (and many of the properties in the Nutmeg Valley Road site do), then one of the parties to a transfer must certify that they will investigate and remediate that property. State remediation standards may differ from EPA's, and remediation may be necessary in order to meet state requirements.
Links to Other Site Information
Newsletters & Press Releases:
Federal Register Notices:
Reports and Studies:
Wolcott Public Library, 469 Boundline Road, Wolcott, CT 06716. Call 203/879-8110 for library hours.
OSRR Records and Information Center, 1st Floor, 5 Post Office Square, Suite 100 (HSC), Boston, MA 02109-3912 (617) 918-1440
|EPA Remedial Project Manager: ||Karen Lumino |
|Address: ||US Environmental Protection Agency|
5 Post Office Sq., Suite 100
Mail Code: OSRR07-4
Boston, MA 02109-3912
|Phone #: ||617-918-1348 |
|E-Mail Address: ||firstname.lastname@example.org |
|EPA Community Involvement Coordinator: ||Rudy Brown |
|Address: ||US Environmental Protection Agency|
5 Post Office Sq., Suite 100
Mail Code: ORA01-1
Boston, MA 02109-3912
|Phone #: ||617-918-1031 |
|E-Mail Address: ||email@example.com |
|State Agency Contact: ||Sheila Gleason |
|Address: || |
|Phone #: ||860-424-3767 |
|E-Mail Address: ||firstname.lastname@example.org |