Update for the Week Ending February 3, 2017

Site Remediation Continues
Deep Excavation Nears Completion

Deep Excavation Nears Completion:

  • Continued the application of water for dust control;
  • Continued the application of foam and 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 pads, excavated areas, sumps and dewatering wells to the water treatment plant (WTP);
  • Continued operation of the WTP and discharge to the sewer;
  • Continued lining and loading trucks and shipping impacted soil to Bayshore Soil Management for treatment and disposal:
    • 11 trucks; 292.85 tons shipped last week; and
    • 63,214.70 tons shipped to date.
  • Removed the last remaining dewatering well in the deep excavation;
  • Continued the import of select fill;
  • Continued backfilling in the deep excavation with stone, reuse soil, and select fill;
  • Continued compaction of the backfill;
  • Continued compaction testing of the backfill lifts;
  • Continued cutting the support of excavation (SOE) wall tiebacks and removing whalers and bracing; and
  • Decontaminating and demobilizing equipment from the Site.

Recently Completed:

  • Completed the deep excavation in the temporary containment building (TCB).

Upcoming activities:

  • Cut all SOE wall sheet piles to five feet below final Site grade;
  • Disassemble and demobilize the TCB;
  • 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

Excavating and loading lined trucks with the last impacted soil from the deep excavation (30 feet deep).

Lining trucks prior to being loaded with impacted soil from the deep excavation.

Placing stone over the geotextile fabric in the completed deep excavation area.

Compacting reuse soil backfill lifts in the deep excavation.

Installing orange demarcation fabric over the reuse soil backfill.

Placing and grading select fill backfill lifts.

Compacting testing the select fill backfill lifts.

Pressure washing equipment on the decontamination pad prior to demobilizing from the Site.