Website Update – April 17, 2025

National Grid’s contractor, Posillico Environmental, Inc. (Posillico), began implementation of interim remedial measure (IRM) activities at the K-Equity Works former Manufactured Gas Plant (MGP) Site to address MGP Site related impacts in accordance with the New York State Department of Environmental Conservation (NYSDEC) approved design. The IRM work is located at 222 Maspeth Avenue, Brooklyn, NY, with a support area across the street at 287 Maspeth Avenue.

Mobilization began on June 26, 2023, with full time work activities starting on July 31, 2023. Intrusive activities at the Site were suspended on September 20, 2024. Community air monitoring ceased on September 16, 2024, and restarted on November 18, 2024, while noise, vibration and settlement monitoring have remained ongoing during the work stoppage.

Overview:

  • The key elements of the remediation work include:
    • Underpinning of certain site structures;
    • Removal of surficial concrete;
    • Shallow excavation;
    • In-situ soil stabilization / solidification;
    • Deep excavation under a temporary tent structure; and
    • Site restoration.
  • Measures have been established to reduce potential noise, vibration, and dust from the work.
  • Air, noise, and vibration monitoring are conducted to ensure that the work is performed in accordance with the requirements of the NYSDEC, the New York State Department of Health (NYSDOH) and New York City (NYC). 

On-going activities:

  • Collected residual fluids and sediment generated during the water treatment system (“WTS”) cleanout are being prepared for disposal.
  • Community Air Monitoring, noise, vibration, and settlement monitoring continue.

Recently completed activities:

  • Transport of spent carbon sacks previously stored offsite back to 222 Maspeth Avenue for future offsite disposal.

Upcoming work activities:

  • Disposal of residual fluids and solids generated during the WTS cleanout.  

Community Air Monitoring Plan Summary

For the period between 03/15/2025 – 04/15/2025, there were no measured readings above action levels associated with site activities for Total Volatile Organic Compounds (TVOC) or Particulate Matter (PM-10).