What is a critical requirement for subsurface impounds?

A critical requirement for subsurface impounds is the use of double liners. This design is essential for preventing the potential leakage of hazardous materials into the surrounding environment. Double liners consist of two layers of impermeable material, with a leachate collection system placed between them. This setup provides an extra layer of protection, as it allows for the monitoring of any leakage and reduces the risk of groundwater contamination.

The effectiveness of double liners is especially important given the potential harm that can occur if substances leak into the soil and aquifers. Regulations often mandate this design in order to ensure safety and compliance with environmental protection standards. Such measures are crucial for safeguarding public health and maintaining the integrity of the ecosystem surrounding subsurface impoundments. Regular inspections, while important, do not replace the need for physical barriers like double liners in preventing contamination.