Update for the Week Ending September 16, 2016

Site Remediation Continues

On-going activities:

  • Continued the application of water, odor-suppressant foam, and BioSolve for odor and dust 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 deep excavation within the support of excavation (SOE) wall under the temporary containment building (TCB); and
  • Continued lining and loading trucks and shipping impacted soil to Bayshore Soil Management for treatment and disposal:
    • 17 trucks; 490.46 tons shipped last week; and
    • 23,933.35 tons shipped to date.
  • Continued shallow excavation on the western areas of the Site;
  • Continued crushing reuse material from the western shallow excavation; and
  • Mobilized drill rigs and initiated the installation of tie-backs through the SOE sheet pile wall for external bracing.

Upcoming activities:

  • Continue deep excavation within the SOE wall under the TCB; and
  • Continue backfilling with select fill in the shallow excavation.

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 fifteen-minute Action Limit exceedances for Total Volatile Organic Compounds (TVOCs) or odors during this reporting period.

There was one instance of the fifteen-minute average concentration of Particulate Matter (PM-10) [dust] exceeding the applicable Action Limit at AMS-2 on September 13, 2016 due to exhaust from an excavator operating near the station.

There were two instances of the fifteen-minute average concentration of Particulate Matter (PM-10) [dust] exceeding the applicable Action Limit at AMS-3 on September 14, 2016 during shallow excavation while water was being applied.  Additional water was applied to the excavation, and the dust levels decreased below the Response Limit.

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 impacted material in the deep excavation in the TCB.

Removing reinforcing steel from concrete structures in the deep excavation.

Placing a liner on the current bottom of the excavation in the TCB.

Placing clean stone on the liner for a work platform in the TCB.

Installing tie backs through the SOE sheet pile wall for external bracing to continue the deep excavation.

Breaking concrete structures to be removed in the shallow excavation and applying water for dust control.

Crushing reuse material and applying water for dust control.