Which of the following describes the requirement for grading in the construction of a mound system?

The requirement for grading in the construction of a mound system is focused on minimizing surface water intrusion into the mound area. This is crucial because surface water can lead to saturation of the system, compromising its function and potentially leading to system failure. Grading that directs surface water away from the mound helps maintain the integrity of the system, allowing for effective treatment of wastewater. Proper grading enhances drainage and ensures that the mound can function efficiently by preventing excess water from overwhelming the system. This principle is based on the understanding that maintaining the appropriate moisture levels in the soil and in the mound itself is essential for its operational success.