What role does grading play in a mound system?

Grading in a mound system is crucial for maintaining proper drainage and preventing water from pooling around the system. By sloping the ground away from the mound, the grading facilitates the flow of rainwater away from the absorption area, which helps to ensure that the system functions effectively and prevents potential flooding or saturation of the absorption fields. This is vital because pooling water can lead to system failure or decreased performance, as excess moisture can overwhelm the absorption capacity of the soil and hinder the treatment process. Maintaining appropriate grading thus plays a significant role in the longevity and efficiency of the mound system.