Environmental

SWMU 04

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SWMU 04

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

Site ID, Name, and Status Background and Pertinent Documents
SWMU 04/02
McComish Gorge

Land use controls (LUCs)
  • Former waste disposal area covering approximately 10 acres where unknown amounts and types of garbage and trash were buried, including construction debris, office trash, plaster-filled warheads, and metal shavings.
  • The Resource Conservation and Recovery Act Facility Investigation (RFI) results indicate metals contamination (iron and manganese) in groundwater present a potential unacceptable future human health risk for residential exposure. In addition, unacceptable future human health and ecological risks are assumed to be associated with exposure to buried debris if the debris is uncovered or brought to the surface. Currently, there are no unacceptable human health or ecological risks.
  • The Statement of Basis recommended LUCs to prevent use of groundwater along with seven-year reviews.
  • RFI, December 2005; Administrative Record Files (ARF) 000965, 000966, 000967, and 000968.
  • Statement of Basis, October 2016; ARF 002666.
  • Corrective Measure Implementation Plan; January 2018; ARF 002739.

 

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