Which of the following is a correct distance for public water supply lines to be from lined evapotranspiration beds?

The recommended distance for public water supply lines from lined evapotranspiration beds is 10 feet. This distance is crucial for maintaining the integrity and safety of the public water supply system. The rationale behind this specific distance is to ensure that there is adequate protection against any potential contamination that could arise from leachate or runoff from the evapotranspiration beds.

Evapotranspiration beds are designed to manage wastewater and may contain various organic and inorganic substances. By establishing a minimum distance of 10 feet, it helps to minimize the risk of these substances infiltrating the groundwater or coming into contact with the public water supply lines, which are critical for human consumption and use. This distance is aligned with health and safety standards set forth by regulatory agencies to protect public health, ensuring the safe and reliable delivery of potable water.

Other distances, such as 7, 12, or 8 feet, do not meet the established guidelines for safety and could possibly expose the water supply to higher risks of contamination. Thus, the correct and safe distance is indeed 10 feet.