Gas used for cooking, lighting, heating and commercial purposes was manufactured and stored at the Patchogue Manufactured Gas Plant (MGP) Site. The MGP was constructed by the Patchogue Gas Company in approximately 1904 and produced gas continuously through 1914 and intermittently into the 1920’s, in which era the company was acquired by the Long Island Lighting Company. The MGP was then modified to distribute under high pressure gas produced off-site. The distribution facility remained until the 1970’s, when LILCO sold the site to third parties. From the mid-1970s through early 2005, the site was used as a refrigeration equipment and scrap storage yard, before KeySpan (now National Grid) acquired it in May 2005 for purposes of remediation.
The by-products of gas production and storage that spilled, leaked, or were disposed on the site are responsible for contamination which is now being addressed through am investigation and remediation process being conducted under the oversight of the New York State Department of Environmental Conservation by National Grid. National Grid is 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 Patchogue former MGP Site, the investigation and remediation project 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 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.
For more information about the New York State Department of Environmental Conservation’s Manufactured Gas Plant Site program go to: http://www.dec.ny.gov/chemical/8430.html
National Grid will provide an activity update for neighbors of the Patchogue former MGP site as developments related to the remediation of the Site warrant. The update will describe the work being done on and near the site, and provide an outlook and schedule for upcoming work, including information about any work that may impact normal community activities. The Report Archive section under the Key Documents tab of this website will include all of the past Updates.
In addition, any questions pertaining to the site can be posed by calling the project Hotline at (631) 348-6250.Site Remedy Completed November 6 2020
Posillico Environmental, Inc. (Posillico), completed the remedy implementation on both the on-site and off-site properties. The final activities completed included installation of the asphalt pavement cover, construction of the post-remediation stormwater management system, and installation of the perimeter fence. Crack monitoring gauges were removed, construction equipment was demobilized. A final site inspection was conducted with National Grid.
Brown and Caldwell Associates, National Grid’s Project Engineer, will prepare the final documentation for the Site which includes the Final Engineering Report and the Site Management Plan. These documents will be submitted to NYSDEC for their approval. An Environmental Easement will also be established for the Site Property, as required by the NYSDEC. Quarterly groundwater sampling continues to be conducted on the Site.
New York State Department of Environmental ConservationGerald Pratt
NYSDEC
625 Broadway
Albany, NY 12233-7014
(518) 402-9667
New York State Department of Health
Jacquelyn Nealon, Project Manager
NYSDOH - BEEI
Empire State Plaza
Corning Tower Room 1787
Albany, NY 12237