Wisconsin Mound Soil Absorption System and Area FillPractice Exam

What is the primary sizing criterion for Area Fill mounds?

1. Requires a basal loading rate

2. Requires only a percolation rate

3. Requires both basal and linear loading rates

4. Requires slope evaluation

The correct answer is: Requires only a percolation rate

The primary sizing criterion for Area Fill mounds is primarily based on the percolation rate of the soil. This aspect is critical because the percolation rate affects how quickly effluent can be absorbed by the soil and how effectively it can filter pollutants. A suitable percolation rate ensures that the wastewater will be treated adequately before reaching the groundwater. When designing an Area Fill mound system, understanding the percolation rate allows for proper sizing and layout, ensuring that the system will function as intended without causing environmental issues such as groundwater contamination. While other factors like basal loading rates may be considered later in the design process, the first and foremost criterion is the percolation rate, as it directly influences the design's ability to manage the effluent effectively.