Solvent Finishers State Superfund Site
Remedy Selected for Site located at 601 Cantiague Rock Road, Jericho, Nassau County - Update July 2016
Documents Related to the Cleanup of this Site
- Solvent Finishers Site Record of Decision (PDF) (2.07 MB) -- The Record of Decision presents the remedy selected to address site contamination and addresses public comments in an included Responsiveness Summary.
Record of Decision
NYSDEC held public meetings on March 15 and April 18, 2016 to present the Proposed Remedial Action Plan (PRAP) for the site. The comments received at the meetings and during the public comment period (February 25, 2016 through April 26, 2016), along with the administrative record, were considered in preparing the final ROD for the site.
The selected remedy is the same as originally proposed in the PRAP.
The comments received from the public are addressed in the Responsiveness Summary that is also included in the ROD.
The site is listed as a Class "2" site in the State Registry of Inactive Hazardous Waste Sites (list of State Superfund sites). A Class 2 site represents a significant threat to public health or the environment; action is required.
Major Elements of the Chosen Remedy
- A combination of Air Sparge/Soil Vapor Extraction will be employed to address the source area soil, soil vapor and shallow groundwater contamination on and near site.
- An In-Situ (in-place) Chemical Oxidation technology will be used to treat the groundwater on and near the site, while Enhanced Bioremediation will be undertaken in the more dilute areas of the groundwater plume downgradient of the source area.
- Vapor Mitigation systems will be required at any on-site and off-site buildings impacted by the site to mitigate the migration of vapors into the building from soil and/or groundwater.
- This alternative also requires site management, including institutional and engineering controls, to ensure the remedy continues to be protective and to ensure safe reuse of the property where contamination will remain in place.
The estimated cost to implement the remedy is $14,181,000. The cost to construct the remedy is estimated to be $12,036,000 and the estimated average annual cost is $204,000.
Summary of the Investigation
Environmental samples have been collected from soils, groundwater, soil vapor and indoor air and have identified the main contaminants of concern at this site to be tetrachloroethene (PCE)and trichloroethene (TCE).
On-site soil was analyzed for volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), and metals. Both on-site and off-site groundwater was analyzed for volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), iron and manganese. Based on investigations to date, the primary contaminants of concern are Tetrachloroethylene (PCE) and Trichloroethylene (TCE). They have been found in on-site and off-site groundwater, on-site soil, and both on-site and off-site soil vapor, sub-slab vapor and indoor air. The highest levels of contamination were found near the south side of the building where the presence of DNAPL is suspected.
- Soil- Solvent contaminated soils are found on-site from 5 feet below the surface to the water table at 85 feet below ground surface. The highest soil contaminant concentration of PCE was reported at 7,300 ppm (parts per million) at the water table, which exceeds both the Industrial Use Soil Cleanup Objective of 300 ppm and the Protection of Groundwater Soil Cleanup Objective of 1.3 ppm. TCE at 1.2 ppm which exceeds the Protection of Groundwater Soil Cleanup Objective of 0.47 ppm.
- Groundwater- PCE and its associated break down products were found in on-site and off-site groundwater at concentrations exceeding the groundwater standards of 5 ppb (parts per billion). The maximum on-site concentrations are; PCE of 300,000 ppb and TCE of The contamination has migrated south about 4,000 feet off-site and the maximum off-site concentrations are PCE of 81,000 ppb and TCE of 89 ppb.
- Soil Vapor and Indoor Air- VOCs were detected in on-site sub-slab soil vapor and indoor air. On-site sub-slab vapor contaminant concentrations were detected up to a maximum of 119,349 ug/m3 (micrograms per cubic meter) for PCE; and 2,466 ug/m3 for TCE. On-site indoor air VOC concentrations were detected up to a maximum of 335 ug/m3 for PCE; and 1.6 ug/m3 for TCE. While this TCE level is above concentrations commonly observed but below NYSDOH's guideline of 2 ug/m3, the maximum concentration of PCE detected exceeds both NYSDOH's air guideline of 30 ug/m3 and immediate action level of 300 ug/m3 for PCE. PCE and TCE were also detected at one off-site commercial property in sub-slab vapor and indoor air. PCE concentrations were detected to a maximum of 1,070 ug/m3 and TCE to a maximum of 1.67 ug/m3 in off-site sub-slab vapor. Off-site indoor air concentrations of PCE were detected to a maximum of 16.6 ug/m3 (which is above levels commonly observed) and TCE to a maximum of 0.81 ug/m3 in off-site indoor air. Off-site soil vapor (soil gas) was detected at 32.9 ug/m3 of PCE. TCE was not detected. NYSDEC developed the proposed remedy after reviewing the detailed investigation of the site and evaluating the remedial options in the "feasibility study" submitted under New York's State Superfund Program.
Background
Location: The Solvent Finishers site is located in a suburban portion of Nassau County, New York. The site occupies about 3.8 acres at 601 Cantiague Rock Road. The site is located on Cantiague Rock Road about 500 feet east of the intersection of Jericho Turnpike and Brush Hollow Road.
Site Features: The site is currently occupied. The main site features includes one large, extended one story building surrounded by paved and gravel parking areas.
Current Zoning and Land Use: The site is currently zoned Industrial (light manufacturing) and is occupied by Rubies Costume. The surrounding parcels include commercial, industrial and public use. A school is located across Cantiague Rock Road. The nearest residential property is about 400 feet northeast of the site.
Past Use of the Site: The site has a history of solvent use and has operated as a manufacturer of artificial leather and plastics, an industrial dry cleaner, and manufacturer of imprinted and embroidered sportswear. The Nassau County Department of Health documented wastewater discharges to the ground and site drainage structures starting in 1977. In 1998, 59 tons of tetrachloroethylene (PCE) contaminated soil was excavated from an abandoned cesspool and disposed off-site.
Site Geology and Hydrogeology: The geology at the site generally consists of stratified sand and gravel with some fine grain material from the ground surface down to about 200 feet where clay is found. The depth to groundwater in the Upper Glacial Aquifer is about 85 feet below ground surface. The groundwater generally flows in a southerly direction.
Additional site details, including environmental and health assessment summaries, are available on NYSDEC's Remedial Site Database website.
For More Information
Project documents are available at the following locations to help the stay informed:
| Jericho Public Library Reference Section 1 Merry Lane Jericho, NY 11753 phone: 516-935-6790 |
Westbury Memorial Public Library |
Who to Contact
Comments and questions are always welcome and should be directed as follows:
Project Related Questions
Robert DeCandia
Department of Environmental Conservation
Division of Environmental Remediation
625 Broadway
Albany, NY 12233-7015
518-402-9693
derweb@dec.ny.gov
Site-Related Health Questions
Jacquelyn Nealon
New York State Department of Health
Bureau of Environmental Exposure
Empire State Plaza, Corning Tower Room 1787
Albany, NY 12237
518-402-7880
BEEI@health.ny.gov
