What is the primary purpose of a mound soil absorption system?

The primary purpose of a mound soil absorption system is to treat and disperse effluent from a septic tank. This system is designed specifically for properties where traditional septic systems are not viable due to high groundwater levels, poor soil conditions, or limited space.

In a mound system, treated effluent from a septic tank is delivered to a specially constructed mound, which consists of sand and other materials that help filter and absorb the wastewater. The mound allows for effective microbial action within the soil, which further breaks down contaminants in the effluent before it percolates into the ground. This method not only ensures that harmful pathogens and nutrients are properly treated but also aids in protecting groundwater and surrounding ecosystems from contamination.

The other options, while relevant to topics in environmental management, do not pertain directly to the functions of a mound soil absorption system. Collecting stormwater runoff, serving as a structural foundation, and filtering surface water contaminants are distinct purposes that do not align with the specific design and operation of a mound system, which is focused on treating and managing effluent from septic systems.