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Richardson Hill Road Landfill
Sidney Center, NY

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Larisa W. Romanowski (518) 407-0400

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The EPA added the Richardson Hill Road Landfill site, located in the Towns of Sidney and Masonville, Delaware County, New York to the Superfund National Priorities List on July 1, 1987 because hazardous chemicals were found in the site’s soil, sediment, and ground water. In 1964, the Town of Sidney entered into a contract for the disposal of Town wastes at the landfill, including spent oils from the Scintilla Division of Bendix Corporation (predecessor to Honeywell International, Inc. and Amphenol Corp.). The landfill was in operation from 1964 to 1969.  The site consists of two sections, referred to as the “South Area” and the “North Area.” The South Area contains an 8-acre landfill, South Pond, and Herrick Hollow Creek. The North Area included two small disposal trenches and a man-made surface water body called North Pond.  Tests of soils and sediments at the site found unsafe levels of polychlorinated biphenyls (PCBs) and volatile organic compounds (VOCs). Ground water at the site was found to contain oily wastes and VOCs. PCBs and solvents were found in the surface water of South Pond and sediments in South Pond and Herrick Hollow Creek. The New York State Department of Health issued a consumption advisory for brook trout caught in the Herrick Hollow Creek in 1998.

Based on the results of the investigation to determine the nature and extent of the contamination at the site, and an evaluation of cleanup alternatives, the 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, TSCA cell construction (disposal cell that accepts PCB contaminated waste with levels greater than 50 parts per million), and ground water extraction (North Area via extraction wells and South Area via an interceptor trench) and treatment.  The ground water extraction and treatment system has been in operation since 2004. The contaminated soil and sediment excavation, on-and off-site disposal, on-site disposal cell construction, and installation of the landfill cap were completed in 2006. The restoration of Herrick Hollow Creek (where contaminated sediments were removed) was completed in late summer 2008.

In 1993, as an immediate action, approximately 2,200 cubic yards of contaminated sediments from South Pond was excavated.  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.

Under Superfund, the EPA conducts reviews every five years at cleanup sites to evaluate if they continue to protect human health and the environment. The first five-year review of the Richardson Hill Road Landfill was completed in September 2007 and found that the implemented actions at the site protect human health and the environment in the short term; however, in order for the site to be protective in the long term, a final ground water remedy for the eastern portion of the site needed to be implemented. The original cleanup plan called for ground water extraction via a collection trench located immediately downgradient from the landfill, followed by treatment. Based upon the results of a hydrogeologic investigation conducted from 2007 to 2008, it was determined that while the ground water extraction trench was capturing contamination coming from the landfill, ground water contamination located downgradient from the trench was only being marginally influenced by the trench. To address this contamination, an extraction well was installed in this area. The water is being treated at the existing treatment facility. This modification to the cleanup plan remedy was documented in the September 2008 Explanation of Significant Differences for the site. The last five-year review was completed in July 2012 and determined that the actions taken at the site continue to be protective.


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