What is the minimum horizontal distance required between foundations and unlined evapotranspiration beds?

The minimum horizontal distance required between foundations and unlined evapotranspiration beds is set at 5 feet. This requirement is established to ensure that there is adequate separation between the evapotranspiration bed, which is designed to manage wastewater through evaporation and plant uptake, and the foundations of structures. Maintaining this distance is critical for preventing potential issues such as water infiltration into the foundation, compromising structural integrity, and minimizing the risk of odor and other nuisance conditions associated with improperly managed wastewater.

Additionally, the 5-foot separation helps to mitigate contamination risks that could arise if effluent from the evapotranspiration beds were to seep into the building’s foundation area. The regulations provide this distance as a standard to promote safe environmental practices while ensuring the efficient operation of onsite wastewater management systems.