Superfund Site Profile

Field Work Update - May 2017: The U.S. Environmental Protection Agency (EPA) is starting field activities at a portion of the New Cassel/Hicksville Groundwater Contamination Superfund site. Field activities, including drilling to investigate groundwater contamination, are set to begin in the May 2017 in the Salisbury area.  Drilling will be conducted on public roads and in publicly accessible areas. Work is expected to be conducted between the hours of 7:30 a.m. and 5:30 p.m. and will be coordinated with the County of Nassau and the Town of Hempstead to minimize impact to vehicular and pedestrian traffic. Some of the work may be performed during weekends to expedite the schedule and minimize impact to residences.  It is anticipated that drilling activities at each location will take approximately four to six weeks. During this period, moderate noise in the immediate vicinity is expected.

The first phase of work will occur within the area north and east of Salisbury Park Drive, from Carmen Avenue to the east, and south of Old Country Road. It is anticipated that work associated with Phase two will occur south of Stewart Avenue.  Equipment used by EPA’s contractors will include a drilling rig, support vehicles and hand-held devices.

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The New Cassel/Hicksville Ground Water Contamination site (Site) is an area of widespread groundwater contamination in the Town of North Hempstead, Hempstead and Oyster Bay in Nassau County, New York. In 2010, EPA sampling found contaminants in the pre-treated water from four Town of Hempstead wells, six Hamlet of Hicksville wells and one Village of Westbury well. The primary contaminants observed in groundwater at the Site are tetrachloroethylene (PCE), trichloroethylene (TCE) and other volatile organic compounds (VOCs). VOCs are contaminants that evaporate easily into the air and dissolve in water. VOCs are often used as ingredients in paints, solvents, aerosol sprays, cleaners, disinfectants, automotive products and dry cleaning fluids. Past industrial and commercial activities in the area may have contributed to the groundwater contamination at the site. Consistent with the Safe Drinking Water Act that protects public drinking water supplies throughout the nation, the public water suppliers in the area of the Site monitor water quality regularly and have previously installed treatment systems to remove VOCs from groundwater.

From 1988 to 2010, the New York State Department of Environmental Conservation (NYSDEC) identified a number of sources of the contamination and further investigated the contaminated groundwater pursuant to New York State authorities.  In 2010, NYSDEC requested that EPA list the Site on the Superfund Program’s National Priorities List (NPL).  The Site was listed on the NPL in September 2011. EPA is addressing the Site in discrete phases or components known as operable units or OUs. After the Site’s NPL listing, site investigations to determine the nature and extent of contamination and to identify and evaluate remedial alternatives were conducted.