Former Nassau Gas Works Manufactured
Gas Plant Site

The Nassau Gas Works MGP was operating by 1873 and ceased operations prior to 1935. Historical records indicate that an independent company, the Nassau Gas Light Company, operated the plant before merging into The Brooklyn Union Gas Company in 1895. The Brooklyn Union Gas Company is still an operating gas utility and is a subsidiary of National Grid USA Service Co., Inc. (National Grid) and KeySpan Corporation (KeySpan), which are both existing holding companies. National Grid acquired KeySpan in August 2007. Although The Brooklyn Union Gas Company still exists, National Grid is the name most widely recognized by the public and it will be the name for the Company to refer to its current activities.

The plant used coal and petroleum products to create a flammable gas which was piped into the surrounding neighborhoods. The gas was used for cooking, lighting, heating and commercial purposes. The Brooklyn Union Gas Company sold the MGP Site to the United States Navy to accommodate ship-building operations at the Brooklyn Navy Yard in 1941 and has had no further involvement with the Site.

The former MGP Site footprint occupies approximately 3.25 acres of land within the Brooklyn Navy Yard. The Brooklyn Navy Yard Development Corporation (BNYDC) leases property from the City and operates the Brooklyn Navy Yard industrial complex.

Remedial investigation activities completed to date at the former MGP Site have encountered coal tar, which is the primary by-product associated with manufactured gas sites. Coal tar is a brownish to black liquid with an odor similar to driveway sealer. It contains a variety of environmental contaminants including polycyclic aromatic hydrocarbons (PAHs) and benzene, toluene, ethyl benzene, and xylene (BTEX).

This website provides information on the Former Nassau Gas Works MGP, the remediation projects and opportunities for public participation. National Grid is committed to the protection and enhancement of the environment, always seeking ways to minimize the environmental impacts of our activities including the past activities of our subsidiaries. We hope this website, a part of our public participation and outreach efforts, is helpful and informative. If you need additional information or have suggestions to make our website better, please contact the individuals listed under Contact.

For more information about the New York State Department of Environmental Conservation’s Manufactured Gas Plant Site program go to: chemical/8430.html


May 2020

New York State Department of Environmental Conservation (NYSDEC) canceled the public meeting for the Nassau Gas Works MGP Site Proposed Remedial Action Plan (PRAP), originally scheduled for Thursday, March 19, 2020 at 7:00 PM at Brooklyn Navy Yard Building 92, Brooklyn. NYSDEC also postponed a related public comment period for the proposed remedy, which originally had been scheduled to run through March 29, 2020.

To limit the community spread of COVID-19, Governor Cuomo issued Executive Order 202.15 suspending in-person public meetings relating to proposed site remedies. The NYSDEC remains committed to providing the public with ample opportunity to provide input on proposed remedies in your community. You are encouraged to provide comments in writing to the NYSDEC Project Manager during the 30-day public comment period, from April 22 through May 22, 2020.

For more information on the activities mentioned above, please leave a message on our hotline at (718) 982-7349.

Project Description

The updated fact sheet, dated April 2020 provides information about the remedy proposed by NYSDEC. The fact sheet can be found in the Key Documents section.

Nassau Gas Works MGP Site April 2020 Fact Sheet

The proposed remedy (PRAP) for the site includes:

  • Maintenance of a protective cover system;
  • Removal of coal tar at depth with installation of recovery wells;
  • Implementing a Health and Safety Plan and Community Air Monitoring Plan during all ground intrusive activities;
  • Implementing a Site Management Plan (SMP) for long-term maintenance of the remedial systems; and
  • Recording of an Environmental Easement to ensure proper future use of the site.