Update for the Week Ending March 24, 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 treatment and discharge of water to the sewer;
  • Continued lining and loading trucks and shipping impacted soil to Bayshore Soil Management (BSM) for treatment and disposal:
    • 4 trucks; 96.22 tons shipped last week; and
    • 63,330.42 tons shipped to BSM to date.
  • Continued backfilling in the deep excavation with select fill;
  • Continued compaction of the backfill lifts;
  • Continued compaction testing of the backfill lifts;
  • Initiated cutting drainage slots along the perimeter of the support of excavation (SOE) wall sheet piles;
  • Initiated the decontamination of the WTP components;
  • Initiated the installation of two NAPL recovery wells along N. 12th Street;
  • Initiated the abandonment of Site wells; and
  • Continued decontaminating and demobilizing equipment from the Site.

Recently Completed:

  • Completed cutting and removal of the support of excavation (SOE) wall sheet piles to five feet below final grade; and.

Upcoming activities:

  • Complete backfilling in the deep excavation;
  • Complete excavation and backfilling in the western shallow excavation area;
  • Import and place topsoil;
  • Hydroseed the Site;
  • Replace damaged sidewalks along N. 12th Street, Kent Avenue, and N. 11th Street; and
  • Install fencing around the 50 Kent Avenue property.

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.

The Action Limit of 150 ug/m3 for Particulate Matter (PM-10) [dust] was exceeded on March 21, 2017, at AMS-1 from 11:32 a.m. to 12:06 p.m. During that time, an excavator with a faulty turbo was creating large plumes of exhaust near the station. Once the excavator was moved, dust concentrations returned to operational conditions.

The Action Limit for dust was exceeded on March 22, 2017, at AMS-2 from 2:25 p.m. to 5:04 p.m. During that time, high winds and strong gusts were creating plumes of dust from the clean select fill backfill. Due to icy conditions, water was not applied to site surface.  Dust concentrations returned to normal operational conditions once the winds subsided.

The Action Limit for dust was exceeded on March 23, 2017, at AMS-2 from 8:13 a.m. to 8:28 a.m. During that time, the Contractor was using a hoe-ram to break up pieces of concrete.  Sheets of plastic were laid over the pieces of concrete to complete the breaking, and dust concentrations returned to normal operational conditions.

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


SOE wall sheet piles cut and removed to five feet below final grade.


Clearing backfill along the SOE wall sheet piles to cut drainage slots.


Drainage slots cut in the SOE wall sheet piles.


Preclearing (nonmechanically) to five feet below ground surface prior to installing NAPL recovery wells.


Drilling to install NAPL recovery wells along N. 12th Street.


Loading lined trucks with impacted soils for shipment to Bayshore Soil Management for treatment and disposal.