Update for the Week Ending February 3, 2017

Site Remediation Continues

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 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; and
  • Initiated cutting the support of excavation (SOE) wall tiebacks and removing whalers and bracing.

Upcoming activities:

  • Complete the deep excavation in the temporary containment building (TCB);
  • 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

Placing and grading select fill and reuse soil backfill.

Placing and grading select fill backfill to create an east side equipment access ramp.

Compacting select fill backfill lifts.

Compacting the select fill backfill lifts along the perimeter of the SOE wall sheet piles.

Cutting tiebacks and whalers on the northern SOE wall.

Creating a protected work platform for the excavation of the remaining impacted soils in the southwest corner of the deep excavation (30 feet depth).