Gas used for cooking, lighting, heating and commercial purposes was manufactured at the Sag Harbor Manufactured beginning as early as the 1860’s and continued to the late 1920’s, after which the facility was used exclusively for gas storage and gas distribution. The by-products of gas production and storage that spilled, leaked, or were disposed on the site are responsible for contamination which has been addressed through a Remedial Action Plan, Remedial Design and Remedial Construction approved and conducted with the oversight of the New York State Department of Environmental Conservation by National Grid. The site is owned by National Grid, which was responsible for the investigation and remediation of the site because it was operated by a predecessor company at the time the contamination occurred.

This website provides information on the Sag Harbor former MGP Site, its history, the remedial investigation and the remediation projects. National Grid is committed to the protection and enhancement of the environment, always seeking ways to minimize the environmental impacts of our past, present and future activities. 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 Contacts.

National Grid conducted quarterly groundwater sampling in accordance with the quarterly groundwater monitoring program outlined in the Site Management Plan through the Third Quarter of 2018 (Q3 2018). Following the Q3 2018 sampling event, NYSDEC approved a reduction in sampling frequency from quarterly to semi-annual. The monitoring reports are placed on the website (Major Reports) and in the Document Repository. Since the remediation was conducted, BTEX and total PAH concentrations have been generally decreasing in shallow groundwater on and adjacent to the site and are below historical levels. Concentrations in intermediate and deep groundwater have generally remained at or near detection levels. Many of these wells have satisfied monitoring reduction criteria, as approved by the NYSDEC in March 2014, for having BTEX and PAH compounds meeting Class GA groundwater standards. Since site remediation, measurable quantities of DNAPL have only been identified in one well following remediation and have been generally decreasing.

This website will be updated as developments warrant during the semi-annual groundwater monitoring to ensure the community is informed of the progress of the remediation. Reports related to the remediation project will be posted to the Key Documents section of the website as they are completed.

Any questions pertaining to the site can be posed by calling the project hotline number at (631) 348-6250.