Website Update – June, July, August 2023
National Grid’s contractor, Posillico Environmental, Inc. (Posillico), is implementing 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 activities are being performed 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. Community air monitoring and vibration monitoring are being conducted during this project.
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 will be conducted each day to ensure that the work is conducted in accordance with the requirements of NYSDEC, New York State Department of Health (NYSDOH) and New York City (NYC).
June 2023
On-going activities:
- Mobilization of materials and equipment.
- Setting up traffic controls along Maspeth Avenue.
- Setting up site controls.
Recently completed activities:
- None.
Upcoming work activities:
- Continued mobilization of materials and equipment.
- Continued site preparation activities.
- Setting up air, noise, and vibration instrumentation and monitoring.
Community Air Monitoring Plan Summary
Continuous community air monitoring will be performed throughout the project.
July 2023
On-going activities:
- Mobilization of materials and equipment.
- Setting up traffic controls along Maspeth Avenue.
- Setting up site controls.
- Air, noise, and vibration monitoring.
Recently completed activities:
- Setting up air, noise, and vibration instrumentation.
- Well abandonments at 222 Maspeth Avenue.
Upcoming work activities:
- Continued mobilization of materials and equipment.
- Continued site preparation activities.
- Setting up temporary facilities at 287 Maspeth Avenue.
- Demolition of sections of concrete slab at 222 Maspeth Avenue.
- Pre-characterization sampling of soil and concrete at 222 Maspeth Avenue.
Community Air Monitoring Plan Summary
Continuous community air monitoring is on-going. For the period between 07/20/2023, when the air monitoring began on a full-time basis, through 07/31/2023, there were no measured readings above action levels associated with Site activities for Total Volatile Organic Compounds (TVOC) or Particulate Matter (PM-10).
August 2023
On-going activities:
- Continued construction of underpinning system at 222 Maspeth Avenue.
- Continued demolition of concrete slab sections at 222 Maspeth Avenue.
- Air, noise, and vibration monitoring.
Recently completed activities:
- Mobilization of materials and equipment.
- Setting up temporary facilities at 287 Maspeth Avenue.
- Pre-characterization sampling of soil and concrete at 222 Maspeth Avenue.
- Relocating concrete bin blocks from 222 Maspeth Avenue to 287 Maspeth Avenue.
Upcoming work activities:
- Soil excavation and removal of former MGP structures at 222 Maspeth Avenue.
- Transportation (trucking) and offsite removal of excavated soil, demolished concrete, and misc. materials at 222 Maspeth Avenue.
Community Air Monitoring Plan Summary
Continuous community air monitoring is on-going. For the period between 08/01/2023 through 08/31/2023, there were no measured readings above action levels associated with Site activities for Total Volatile Organic Compounds (TVOC) or Particulate Matter (PM-10).