RICHARDSON HILL ROAD LANDFILL/POND
SIDNEY CENTER, NY
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The Richardson Hill Road Landfill site is located in Sidney and Masonville, New York. The privately-owned landfill accepted municipal waste and spent oils from the Scintilla Division of Bendix Corporation (predecessor to Honeywell International, Inc. and Amphenol Corp.) from 1964 to 1969. Landfill operations contaminated soils, sediment, and groundwater with hazardous chemicals. The site consists of two sections–the South Area and the North Area. The South Area contains an eight-acre landfill, South Pond, and Herrick Hollow Creek. The North Area includes two small disposal trenches and a manmade surface water body called North Pond.
Following immediate actions to protect human health and the environment and additional investigations, EPA placed the site on the Superfund program’s National Priorities List in 1987.
What Has Been Done to Clean Up the Site?
The site is being addressed in two stages: immediate actions and a long-term remedial phase focused on cleanup of the entire site.
Immediate Actions: In 1993, in response to a fish kill in South Pond attributable to the seep of contaminants from the oil disposal pit, the site’s potentially responsible parties (PRPs) excavated about 2,200 cubic yards of highly contaminated sediments from South Pond. In addition, seep interceptor collection basins upgradient of South Pond and a sediment trap weir system at the outlet of South Pond were installed to prevent the downstream migration of contaminated sediments. Also, two water supply treatment systems were installed at nearby homes with contamination in their wells attributed to the site. Following the detection of contamination in an additional private water supply in 1997, it was replaced with a deeper well.
In 1999, the PRPs fenced the landfill and placed a sediment weir trap in Herrick Hollow Creek, about a mile south of the South Pond, to minimize migration of contaminated sediment further downstream. During the long-term cleanup, both sediment weir traps were removed along with the contaminated sediment in the South Pond and the Herrick Hollow Creek.
Long-Term Cleanup: Based on the results of a remedial investigation to determine the nature and extent of the contamination at the site and an evaluation of cleanup alternatives in a feasibility study, EPA selected a cleanup plan for the site in 1997. The cleanup plan called for soil and sediment excavation/dredging, consolidation, on- and/or off-site disposal, installation of a landfill cap, Toxic Substance Control Act cell construction (a disposal cell that accepts PCB-contaminated waste with levels greater than 50 milligrams per kilogram), and groundwater extraction (North Area via extraction wells and South Area via an interceptor trench) and treatment.
Contaminated soil and sediment excavation, disposal cell construction, and landfill cap construction were completed in 2006. The groundwater extraction and treatment system has been in operation since 2004. Additional groundwater investigations from 2007 to 2008 found contamination southeast of the groundwater interceptor trench. Subsequently, a recovery well was installed in this area. The water is being treated at the existing treatment facility. To prevent dewatering the nearby wetland, the groundwater is being extracted at a low rate and on an intermittent basis.
What Is the Current Site Status?
The groundwater extraction and treatment system has been in operation since 2004.
Five-year reviews are conducted at sites to ensure that the remedies put in place protect public health and the environment, and function as intended by site decision documents. Five-year reviews have been were conducted at the site in September 2007, July 2012, and July 2017. The most recent five-year review was conducted in 2017. It concluded that response actions at the site are in accordance with the remedy selected by EPA and that the remedy continues to be protective of human health and the environment. The next five-year review will be conducted by July 2022.