Some pond and lagoon structures aren’t filled upon construction, but instead, function as a form of secondary containment for another pond or tank. Groundwater that is highly concentrated or mixed with sludge is often stored in an enclosed tank until it can be trucked to a burial site or released into a deep well.
Secondary containment lagoons must be designed to hold the volume of the tank or pond they’re protecting. Drains and pumps are also necessary to remove storm water periodically so that the containment area’s volume isn’t reduced by runoff.
