Website Update – October 24, 2024

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 while noise, vibration and settlement monitoring are 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.
  • There are established measures 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:

  • Currently, select equipment, materials, and systems were demobilized due to work suspension.
  • Cleanout of water treatment system (WTS) components at 222 Maspeth Avenue.
  • Residual fluids and sediment generated during the WTS cleanout are being collected and prepared for disposal.
  • Air, noise, and vibration monitoring continue.

Recently completed activities:

  • Placement of temporary filter fabric for soil cover at 222 Maspeth Avenue.

Upcoming work activities:

  • No work activities currently scheduled.
  • Residual fluids and sediment generated during the WTS cleanout were collected and prepared for disposal.

Community Air Monitoring Plan Summary

Continuous community air monitoring was on-going for the period between 09/14/2024 – 09/16/2024.There were no measured readings above action levels associated with site activities for Total Volatile Organic Compounds (TVOC) or Particulate Matter (PM-10). Due to suspension of intrusive activities, community air monitoring ceased on 09/16/2024.