SWMU = Solid Waste Management Unit; AOC = Area of Concern; UXO = Unexploded Ordnance
Site ID, Name, and Status
Background and Pertinent Documents
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.