Environmental

SWMU 13

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SWMU 13

SWMU = Solid Waste Management Unit; AOC = Area of Concern; UXO = Unexploded Ordnance

Site ID, Name, and Status Background and Pertinent Documents
SWMU 13/14
Mine Fill B

Corrective Measures Study
  • Primarily used for melting and pouring explosives and included a Therminol boiler containing PCBs (polychlorinated biphenyls) which was removed in 1990.
  • 22,115 tons of explosives contaminated soil were processed at a Naval Support Activity Crane bioremediation facility (SWMU 33) in the early 2000s and returned to SWMU 13.
  • Approximately 5,310 tons of PCB contaminated soils were disposed offsite. PCBs remain in subsurface soils at concentrations >1 part per million (ppm) but <25 ppm. Per Toxic Substances Control Act (TSCA) regulations, a cap consisting of two feet of soil must remain on the subsurface contamination, so a TSCA land use control will be required for a portion of the site.
  • The upper zone of groundwater is known to be contaminated with explosives.
  • Additional soil delineation was completed in 2017 and the Resource Conservation and Recovery Act Facility Investigation (RFI) was finalized in 2018.
  • An interim measure (IM) to remove contaminated soil was completed in January 2019. The IM report is expected to be completed in 2019.
  • Draft RFI, April 2007; Administrative Record File (ARF) 001094.
  • Final RFI, March 2018; ARF 002807

 

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