What is the in-place conductivity threshold for low permeability soil in RCRA Subtitle C hazardous waste landfills?

The in-place conductivity threshold for low permeability soil in RCRA Subtitle C hazardous waste landfills is established at 1x10^-7 cm/s. This threshold is crucial because it helps to ensure the integrity of the landfill containment system, preventing the migration of leachate and hazardous materials into the surrounding environment.

Low permeability soils are utilized in landfill design to minimize groundwater contamination, and a conductivity of 1x10^-7 cm/s effectively limits the flow of fluids through the soil matrix. This standard is essential to protect groundwater resources and comply with regulatory requirements governing hazardous waste management.

Understanding this conductivity threshold is imperative for professionals involved in landfill design, implementation, and monitoring, as it directly impacts environmental protection strategies and compliance with environmental regulations.