What is one example of ongoing maintenance in landfill operations?

Ongoing maintenance in landfill operations is typically characterized by regular activities that are performed to ensure the facility continues to operate effectively and safely. Cleaning out sediment control facilities is a prime example of such maintenance. This task involves removing accumulated materials that can obstruct drainage systems and lead to potential flooding or contamination issues. Maintaining these systems is crucial for controlling stormwater runoff and preventing erosion, which can otherwise compromise the integrity of the landfill.

In contrast, the other options represent more significant or one-time construction activities rather than routine maintenance actions. Installing new leachate storage and constructing new landfill cells are capital projects that expand the capacity or enhance certain aspects of the landfill but do not fall under the routine upkeep expected in ongoing operations. Sealing off closed cells is part of a closure process rather than a maintenance task for operational phases. Therefore, cleaning out sediment control facilities stands out as the most fitting example of ongoing maintenance within landfill operations.