I-95 and Pelham Parkway/Shore Road, Bronx, NY, 10474

Unknown

Superfund VOCs "Vapor Intrusion"

Site Description[1] 
The Pelham Bay Landfill is located on property owned by the NYC Parks Department east of Shore Road in the northeastern section of the portion of Pelham Park which is south of the Hutchinson River. Eastchester Bay borders the site from the north to the southeast. The site was operated by the NYC Department of Sanitation (NYCDOS) from 1963 until the early 1980s as a disposal site for mixed municipal waste. Testimony from a driver/dispatcher for the Hudson Oil Refining Co. before the Senate Select Committee on Crime indicated that from 1974 to 1980 waste oil, sludges, metal plating shavings, lacquer, and solvents were illegally disposed at several NYC landfills, including the Pelham Bay Landfill. It has been estimated that up to 1.1 million gallons of hazardous waste may have been illegally disposed at this landfill during this time period. A Remedial Investigation/Feasibility Study (RI/FS) was completed in August 1993. The selected remedy included capping, leachate collection, active gas venting, and post-closure monitoring. An IRM for the construction of groundwater extraction wells and leachate storage tanks was completed in 1993. The first phase of the selected remedy, installation of a slurry wall, construction of a groundwater diversion trench and a leachate collection system was completed in December 1994. The second phase, consisting of the recontouring of the landfill surface, placement of final cover, and the installation of an active gas collection system, was completed in early fall of 1998. The third phase, involving the construction of a permanent leachate transport system to the Hunts Point Treatment Plant was commissioned in early 1998. The site is currently in post-closure OM & M phase.

Site Environmental Assessment
Groundwater has a variety of contaminants in excess of NYS standards. The landfill has been capped to prevent infiltration and production of leachate. Groundwater/leachate is extracted and conveyed to the Hunts Point Sewage Treatment Plant for disposal. Environmental monitoring and maintenance of the cap is ongoing. The active landfill gas collection system, which includes a landfill gas flare, is operational.

Site Health Assessment
Although leachate seeps and landfill gases are present, the 1993 remedial investigation showed that exposure to gases from the landfill is negligible due to dispersion and dilution. Potential public exposures to leachate and soil-gas have been limited futher by the construction of the landfill cap and the installation of leachate and soil-gas collection systems. Samples of shellfish and finfish were collected from Eastchester Bay in 1993 and the results were not significantly different from fish gathered from other nearby areas. The NYSDOH has a issued a fish advisory for Long Island Sound west of Wading River.
Contaminants of Concern
Type of Waste Quantity
ALKYL PHENOL UNKNOWN
CYANIDES (SOLUBLE CYANIDE SALTS) 1000000.00
DICHLOROBENZENE (MIXED) UNKNOWN
DIOCTYLPHTHALATE UNKNOWN
ETHYLBENZENE UNKNOWN
NAPHTHALENE UNKNOWN
TOLUENE UNKNOWN
XYLENE (MIXED) UNKNOWN

admin, Debra Hall

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