About the Williamsburg former Manufactured Gas Plant Site


Gas used for cooking, lighting, heating and commercial purposes was manufactured at the Williamsburg Manufactured Gas Plant (MGP) from approximately 1887 through the late 1930’s or early 1940’s. Historical records, while incomplete, indicate that an independent company operated the plant before that company merged to form Brooklyn Union Gas in 1895. The plant used coal and petroleum products to create a flammable gas which was piped into the surrounding neighborhoods. After the property was sold by Brooklyn Union, it was subdivided and now has multiple private owners and uses, including commercial and warehouse operations and a former City of New York Department of Sanitation garage. National Grid is responsible for the investigation and remediation of the site because it was operated by a predecessor company (Brooklyn Union) at the time MGP-related contamination occurred.

This website provides information on the Williamsburg former MGP Site, the Remedial Investigation of the site, 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/

Site News and Updates

Williamsburg Works Interim Remedial Measure
NAPL Recovery Wells

The non-aqueous Phase Liquid (NAPL) Recovery Well installation and development field work for the 50 Kent Avenue Interim Remedial Measure (IRM) includes the installation of recovery wells to recover coal tar at the 50 Kent Avenue property of the Former Williamsburg Works MGP Site.

Update for the Week Ending March 10, 2017

Site Remediation Nears Completion

Deep Excavation Nears Completion:

  • Continued the application of water and calcium chloride for dust control;
  • Continued the application of BioSolve for Total Volatile Organic Compounds (TVOC), Particulate Matter (PM-10) [dust], and odor control;
  • Maintained erosion and sediment (E&S) controls (Installed waddles - wood chip and straw filled fabric tubes - around the Site perimeter to prevent silt and sediment from leaving the Site and covered all stockpiles);
  • Continued pumping from the decontamination pad to the water treatment plant (WTP);
  • Continued operation and maintenance of the WTP;
  • Continued backfilling in the eastern shallow excavation area with select fill;
  • Continued compaction of the backfill lifts;
  • Continued compaction testing of the backfill lifts;
  • Initiated cutting the support of excavation (SOE) wall sheet piles to five feet below final grade; and
  • Continued decontaminating and demobilizing equipment from the Site.

Recently Completed:

  • Completed the disassembly of the temporary fabric structure (TCB).

Upcoming activities:

  • Install two NAPL recovery wells along N. 12th Street;
  • Complete backfilling in the deep excavation; and
  • Complete excavation and backfilling in the western shallow excavation area.

Community Air Monitoring Plan Summary

Community air monitoring, initiated on Tuesday, December 1, 2015, continues as intrusive (ground disturbance) activities are conducted.

There were no 15-minute Action Limit exceedances for Total Volatile Organic Compounds (TVOC), Particulate Matter (PM-10) [dust], or odors.

If you have any questions or comments about the work on the Site, please use the Williamsburg MGP Telephone Hotline at (718) 403-3053.

Photos of Activity

Removing fabric from the TCB.

Disassembling the TCB superstructure.

Disassembling the TCB superstructure.

Preparing the TCB superstructure components for demobilization from the Site.

Placing and grading the select fill backfill lifts in the eastern shallow excavation area.

Compacting the select fill backfill lifts.

Compaction testing the select fill backfill lifts.

Cutting the southern SOE wall sheet piles to five feet below final grade.

Cutting the western SOE wall sheet piles to five feet below final grade.

Removing sediment and decontaminating two WTP storage tanks.