What is the primary responsibility of designers when preparing the soil for mound systems?

The primary responsibility of designers when preparing the soil for mound systems is to prepare the soil infiltrative surface adequately. This involves ensuring that the top layer of soil is suitable for proper water absorption and treatment of effluent from the septic system. An adequately prepared infiltrative surface optimizes the performance of the mound system, promoting effective filtration and reducing the risk of system failure or contamination of groundwater.

Proper preparation includes aspects such as ensuring appropriate texture, structure, and moisture characteristics of the soil, which are vital for effective drainage and treatment. Ensuring the infiltrative surface is crafted to the correct specifications is essential for the system's longevity and efficiency.

Other options may address aspects of site preparation but do not align with the critical focus of the designer's role in maintaining the integrity and effectiveness of the mound system. For instance, excavating deeper than required does not contribute positively to the system's functionality and could potentially lead to issues with groundwater contamination or insufficient treatment. Installing the mound in any location disregards the specific site requirements essential for effective septic system operation. Lastly, minimizing the area of disturbance can be important for environmental considerations, but it should not compromise the necessary preparation of the soil surface for optimal system performance.