Soils beneath the facility are composed mostly of Late Pleistocene glacially deposited sands and silty sands with some near-surface fill. Kame deposits of coarse to fine gravel and/or sand have been mapped in the vicinity of the facility. Glaciolacustrine deposits exist over most of the facility and thicken to the east. The overburden thickness ranges from less than 30 feet along the western side of the facility to over 100 feet along the east side of the facility, adjacent to the West Branch of the Ramapo River. Beneath the various overburden deposits lies dolomite bedrock. The dolomite bedrock slopes fairly steeply to the east (from an elevation of approximately 500 feet to 410 feet above mean sea level
over a distance of about 1,300 feet, producing and average slope of about seven percent) and is approximately 150 to 300 feet thick. Fracturing in the bedrock is variable, although it generally decreases with depth.
Groundwater flow at the facility within the perched water table and overburden aquifer unit is generally east to southeast toward the West Branch of the Ramapo River. The overburden aquifer is less transmissive along the down gradient side of the facility, which restricts flow through the overburden in that area. In the bedrock aquifer, groundwater flow occurs in a radially eastward direction from an area of higher water levels on the west side of the facility resulting from recharge where the overburden aquitard is locally absent.
Targeted Environmental Media:
 Fractured Bedrock
The lateral and vertical extent of the plume was not identified in the documents examined.
Major Contaminants and Maximum Concentrations:
- Benzene (41 µg/L)
- Toluene (28 µg/L)
- Acetone (Not given)
- 2-Butanone (MEK) (Not given)
- Carbon disulfide (Not given)
- 4-Methyl-2-pentanone (MIBK) (Not given)
- Ethylbenzene (Not given)
- 1,1,1-Trichloroethane (Not given)
- Xylenes (Not given)
- Pyrene (Not given)
No technologies selected.
- Pump and Treat
Comments:
The above chemicals and concentrations were found in the bedrock in 2002. Also found was alpha picoline 26 ug/L and 2-aminopyridine 140 ug/L. Overburden concentrations were considerably higher. A pump and treat system was installed in the mid 1980s and continues to function.
New York State Water Quality Criteria for acetone, ammonia, benzene, 2-butanone, carbon disulfide, ethylbenzene, 4-methyl-2pentanone, toluene, trichloroethane, THP, xylenes, a-picoline, 2-amino-pyridine, benzoic acid, bis(2-ethylhexyl)phthalate, 2,4-dimethlyphenol, 4-methlphenol, phenol, and pyridine.
Concentrations of contaminants in the groundwater have been decreasing over time and the groundwater plume is being contained.
http://www.epa.gov/region02/waste/fsnepera.htm
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