Wisconsin Mound Soil Absorption System and Area FillPractice Exam

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What is the minimum depth to the Seasonal High Water Table for Wisconsin mounds?

6 inches from the surface
10 inches from the surface or deeper
12 inches from the surface or deeper
15 inches from the surface or deeper

The correct answer is: 10 inches from the surface or deeper

The minimum depth to the Seasonal High Water Table for Wisconsin mounds is set to be at least 10 inches from the surface or deeper due to the design requirements of mound systems. This distance is crucial for effective treatment and absorption of wastewater. When the seasonal high water table is too close to the surface, it can lead to insufficient soil treatment, increased potential for surface water contamination, and reduced system performance. Maintaining this minimum depth ensures that the effluent can properly trickle through the soil layers, allowing for adequate filtration and microbial activity, which are essential for breaking down contaminants. This depth also helps to prevent water from saturating the mound, which would compromise its ability to function effectively as a soil absorption system. Therefore, the requirement of having the seasonal high water table at least 10 inches deep is a critical aspect of the design criteria for Wisconsin mounds.