Superfund Information Systems: Site Profile

Superfund Site:

HOPEWELL PRECISION
HOPEWELL JUNCTION, NY

Cleanup Activities

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Background

The Hopewell Precision Site is located in Hopewell Junction in the Town of East Fishkill, Dutchess County, New York. Hopewell Precision, Inc. has operated at either 15 or 19 Ryan Drive since the early 1970's manufacturing sheet metal parts and assemblies. Various painting and degreasing processes used at these locations generated wastes that were reportedly disposed of directly on the ground, resulting in a groundwater contamination plume which now extends about 1.5 miles in a southwesterly direction from 15 and 19 Ryan Drive. The area surrounding the Site is mostly residential, all of which is served by private drinking water wells and septic systems.

 

Hopewell Precision, Inc. is a manufacturer of sheet metal parts that are assembled into furniture. The property at 19 Ryan Drive was vacant land prior to 1980. From 1980 to the present, Hopewell Precision has been the sole occupant of the building on the property. Since 1981, the former facility at 15 Ryan Drive has been used by Nicholas Brothers Moving Company for equipment storage and office space.

Processes at Hopewell Precision include shearing, punching, bending, welding and painting. The painting process includes degreasing prior to the wet spray paint application. Hopewell Precision currently uses a water-based degreaser. The company used trichloroethene (TCE) and 1,1,1-trichloroethane (1,1,1-TCA) in a vapor degreasing machine until 1998. Hopewell Precision reportedly no longer uses TCE or 1,1,1-TCA for degreasing.

In October 1979, EPA received a letter from a former Hopewell Precision employee alleging improper disposal practices. EPA inspected what is now the former facility at 15 Ryan Drive in November 1979. EPA observed solvent odors coming from an open disposal area. At the time of the inspection, Hopewell Precision was alleged to have been dumping one to five gallons per day of waste solvents, paint pigments and sodium nitrate directly on the ground. Following additional site inspections, the New York State Department of Environmental Conservation (NYSDEC) determined that Hopewell Precision was in violation of hazardous waste regulations because it was operating as a hazardous waste storage facility without a permit or interim status authorization. Hopewell Precision subsequently performed corrective measures, including waste disposal, which NYSDEC found to be satisfactory.

After additional investigations, EPA placed the site on the Superfund program’s National Priorities List in April 2005

 

 

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What Has Been Done to Clean Up the Site?

EPA began its cleanup efforts in March 2003. Carbon filtration systems were installed at contaminated wells. Point-of-entry-treatment (POET) systems, which are highly effective in removing volatile organic compounds (VOCs) from drinking water, have been installed in 41 homes. At 53 homes where indoor air showed elevated concentrations of VOCs, EPA installed sub-slab ventilation systems (SVS), which have been successful in addressing vapor intrusion problem. Drinking well and soil gas monitoring is ongoing. Should EPA identify additional affected residences, the Agency will install POET systems and/or SVS in those residences. EPA is working to determine whether, under current conditions, there are any potential or actual human exposures to contaminants at the site. Sampling results from June 2013 found all deep bedrock private well water is clean and free of all VOCs.

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What Is the Current Site Status?

EPA has divided the Hopewell Precision site into two OUs. OU 1 addresses remediation and restoration of the contaminated groundwater to drinking water standards by using naturally-occurring microorganisms that break contaminants down, making them harmless. OU 2 includes provision of an alternate water supply to the area with private drinking water wells that have been or have the potential to be affected by the groundwater plume from the Hopewell Precision facility. The OU 2 Record of Decision (ROD) was completed in September 2008 and the OU 1 ROD was completed in September 2009.

The OU 2 Remedial Design activities began in July 2009; the OU 2 Remedial Design was completed in July 2016. A request for proposal for construction of the water supply infrastructure was issued in May 2017 and an award to a construction contractor is anticipated in Fall 2017.  Site mobilization and construction would not occur until construction contractor workplans are completed and is estimated to be in Spring 2018.

The OU 1 Remedial Design began in September 2010.  Due to declining TCE and 1,1,1-TCA concentrations in groundwater, EPA is presently evaluating whether monitored natural attenuation (MNA) can be an effective remedy in achieving drinking water standards within a reasonable time period. If MNA is determined to be effective in restoring groundwater, EPA will amend the OU 1 remedy selected in the September 2009 ROD.

 

 

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