Which of the following is the correct distance between public water wells and lined evapotranspiration beds?

The correct distance between public water wells and lined evapotranspiration beds is established to ensure the protection of water quality. A distance of 10 feet is specified because it helps mitigate the risk of contaminants from the evapotranspiration beds leaching into the groundwater that supplies the public water wells. This minimum separation distance is part of best practices for water well protection, preventing any adverse impacts caused by wastewater or leachate entering the well's zone of influence. Such measures are crucial in maintaining safe drinking water standards and protecting public health.

In contrast, larger distances, such as those indicated by other options, may not be necessary or might even be detrimental to the practical management and placement of these systems, given the local groundwater flow dynamics and the operational design of the systems involved.