Jan 16, 2022, 6:30 pm


EPA Identifier: 110009342666
CERCLIS ID: 110009342666
40.81805, -73.66666


Create Date: 01-MAR-00
Update Date: 02-JUL-09
Final Date: 19830908

Aerial View Over Time

Create a radius report
Programs: {CERCLIS}
Program Interests:

Site Summary:
Federal Register Notice:  September 08, 1983

Conditions at listing (December 1982): The Port Washington Landfill, also known as the Town of North Hempstead L-4 Landfill, has been in continuous operation since March 1974 on the western side of Hempstead Harbor within Port Washington, Nassau County, New York. The site is bordered by sand pits, the North Hempstead Country Club, and a residential community. The Salem School, which is adjacent to the residential area, is less than 700 feet from the site. Before North Hempstead operated the site as a landfill, it was used for sand mining. At the time, the site sloped gently from an elevation of 40 to 60 feet above mean sea level and terminated in a 100-foot cliff. Over the years, the landfill has accepted refuse at the rate of 200,000 tons per year. This has created a fill 115 feet thick and extending 15 feet above the cliff.

Area residents have complained of gas problems at the site. In early 1981, Nassau County found that methane was migrating off-site and, in a number of instances, creating potentially explosive conditions in adjacent homes. Benzene, toluene, xylene, and vinyl chloride were identified in gas from the landfill. Ground water in a deeper zone (100 to 110 feet below sea level) under the landfill has a high salt content from sand-washing operations when the site was used for sand mining.

Status (July 1983): The State is working with the Town of North Hempstead for cleanup of the site.

EPA is preparing a Remedial Action Master Plan outlining the investigations needed to determine the full extent of cleanup required at the site. It will guide further actions at the site.

Institutional Controls:
Media Where IC Applies
(Multiple entries where more than one pathway is impacted)
Restriction Type Instrument
Ground Water
Prohibit Ground Water Well Installation/Construction
The 1989 Record of Decision did not address institutional controls. However, Nassau County Public Health Ordinance Article 4, prohibits the installation of new private potable water systems in areas served by a public water supply which precludes any future potable water well installations in this portion of the aquifer. In addition, New York Environmental Conservation Law Section 15-527 provides that on Long Island (which includes Nassau County). "No person or public corporation shall hereafter install or operate any new or additional withdraw water from underground sources for any purpose or purposes whatsoever excess of forty-five gallons a minute without a permit pursuant to this title."
The link to this document is currently unavailable. Please contact the regional contacts listed for more information.
Document Issuance, Implementation  December 11, 2003