Which of the following is NOT a consideration for locating drain fields?

When considering the placement of drain fields, the goal is to ensure proper drainage and minimize the risk of contamination. Locating a drain field in areas uphill is generally not advisable because it may lead to issues with drainage. If a drain field is positioned uphill from the septic tank, the gravity flow of wastewater could be impeded, which can cause backups and inefficiencies in the system. Therefore, this choice reflects a situation that does not align with the principles of effective drain field placement.

On the other hand, areas downhill usually allow for better drainage due to gravity assisting the flow of wastewater, while areas on contour can facilitate even drainage without leading to erosion or pooling. Areas of depression may be considered cautiously, as they can trap water, causing saturation that could hinder the functioning of the drain field. Understanding these factors is essential for proper septic system design and functionality.