Environmental

SWMU 11

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SWMU 11

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

Site ID, Name, and Status Background and Pertinent Documents
SWMU 11/00
Old Storage Building 225

Long-term monitoring (LTM)
  • Originally the location of storage Building 225 which was destroyed by fire in 1976. Green water observed in runoff from the firefighting activity persisted over a mile downstream and a fish kill occurred.
  • The Resource Conservation and Recovery Act Facility Investigation (RFI) showed subsurface soil and groundwater are contaminated with several chlorinated volatile organic compounds, benzene, arsenic, and iron, and the contamination presents a potential unacceptable future human health risk. There were no unacceptable ecological risks or no unacceptable current human health risks.
  • A Corrective Measures Study and Statement of Basis recommended monitored natural attenuation, LTM of groundwater and surface water, land use controls, and seven-year reviews to address future potential risks.
  • Biennial LTM of groundwater and surface water began in 2018 and is ongoing.
  • RFI, September, 2015; Administrative Record File 002220.
  • Corrective Measures Study, April 2016; Administrative Record File 002622.
  • Statement of Basis, , September 2016; Administrative Record File 002642.
  • Corrective Measure Implementation Plan, April 2018; ARF 002834.

 

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