Update for the Week Ending September 23, 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:
    • 123 trucks; 3,520.23 tons shipped last week; and
    • 26,914.21 tons shipped to date.
  • Continued shallow excavation on the western areas of the Site;
  • Continued backfilling the shallow excavation with select fill and compacting; and
  • Continued the installation of tie-backs through the SOE sheet pile wall for external bracing:
    • 6 tie-backs installed last week; and
    • 6 of 76 tie-backs installed to date.

Upcoming activities:

  • Continue deep excavation within the SOE wall under the TCB.

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-3 on September 20 2016 during the breaking of clean concrete 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

Removing concrete footers from the shallow excavation area.

Breaking clean concrete in the shallow excavation area.

Applying foam to the shallow excavation for VOC and odor control.

Loading lined trucks with impacted soil from the shallow excavation.

Installing demarcation fabric in the shallow excavation area prior to backfilling.

Washing the lined and loaded trucks at the decontamination pad prior to exiting the Site.

Installing (drilling) tie-backs (external bracing) for the SOE wall in the deep excavation.