Superfund Information Systems: Site Profile

Superfund Site:

WARWICK LANDFILL
WARWICK, NY

Cleanup Activities

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Background

The Warwick Landfill site is located in Warwick, New York. The site is a 19-acre unlined landfill. In the mid-1950s, the Town of Warwick leased the property from the Penaluna family and used the area as a refuse disposal area. Evidence indicates that there were some hazardous materials disposed of at the landfill during this period. The Town of Warwick operated the landfill until 1977, at which time the owner leased it to Grace Disposal and Leasing, Ltd. In 1979, New York State Department of Environmental Conservation (NYSDEC) sampled leachate seeping from the site and detected volatile organic compounds (VOCs), heavy metals and phenols. New York State subsequently issued a restraining order and closed the landfill.

From 1955 to 1977, the Town of Warwick leased the site property and used it as a refuse disposal area. The facility accepted waste from the Town of Warwick, which includes the villages of Florida, Warwick and Greenwood Lake, and other surrounding towns in Orange County. Evidence indicates that there was some disposal of hazardous waste materials at the landfill during this time. The Town of Warwick operated the landfill until 1997.

In April 1977, Grace Disposal and Leasing, Ltd. leased the site property. In July 1977, the Orange County Department of Health granted Grace Disposal a permit to operate the refuse disposal area. During Grace Disposal's operations, wastes and sludges were disposed of in the landfill. In 1979, in response to concerns expressed by the local citizenry that suspicious dumping activities were taking place at the landfill, NYSDEC and EPA collected and analyzed two leachate samples at the site. The results indicated the presence of heavy metals, phenols and VOCs. NYSDEC ordered the closure of the landfill in September 1979. Pursuant to a New York State court order, Grace Disposal covered, graded and closed the landfill.

After site investigations, EPA placed the site on the Superfund program’s National Priorities List in March 1989.

Following investigations, the site’s remedy of capping was put into place. After cleanup, EPA deleted the site off the Superfund program’s National Priorities List in July 2001.

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What Has Been Done to Clean Up the Site?

Source Control: After a remedial investigation and feasibility study (RI/FS) to determine the nature and extent of the contamination, and to evaluate remedial alternatives, EPA selected a source control remedy in the site’s June 1991 Record of Decision, or ROD. It included: 1) capping the landfill; and 2) making sure area residents have a potable water supply. Based on the results of the groundwater sampling, four residential wells with VOC contamination exceeding state and federal drinking water standards were provided with point-of-use carbon treatment units. Construction of the landfill’s multi-layer cap finished in September 1998.

Migration Control: In December 1991, EPA began planning additional investigations to examine the extent of contaminant migration from the site and options to control migration of contaminants. Sampling indicated that low-level contamination found in residential wells was upgradient of the landfill and therefore not site related. EPA selected "no further action" for site groundwater in September 1995.

In 2016, EPA issued its fourth five-year review for the Site which concluded that the remedy implemented at the Site remains protective of human health and the environment.

 

 

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What Is the Current Site Status?

The site has been addressed in two remedial phases focused on source and contaminant migration control and investigation of area groundwater.

EPA conducted an initial evaluation and determined that no immediate actions were needed. As an interim remedy, four residences upgradient of the Site were fitted with point-of-use treatment systems; subsequent investigation indicated that contamination found at these residences was not site-related.

In September 1995, a No Further Action ROD was issued for the Site groundwater.

Construction of the 20-acre synthetic liner cap was completed in September 1998. The Site was deemed construction complete on September 28, 1998.

In July 2001, EPA deleted the site from the Superfund program’s National Priorities List. The PRPs continue to perform operation and maintenance inspections, as well as groundwater and surface water monitoring activities at the landfill.

 

 

 

 

 

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