What does the term 'seepage' refer to in the context of septic systems?

In the context of septic systems, the term 'seepage' specifically refers to the process by which effluent, or the liquid waste that has been processed in the septic tank, enters the surrounding soil in a drain field. This process is crucial for the proper functioning of a septic system. After the septic tank separates solid waste from liquid waste, the liquid effluent is directed into a drain field where it seeps into the soil.

This effluent is then naturally filtered by the soil, which helps to treat the wastewater before it reaches the groundwater or nearby bodies of water. The effectiveness of this process is essential for preventing contamination and maintaining public health. Proper seepage allows for the gradual absorption and treatment of wastewater, ensuring that it does not overwhelm the system or lead to surface pooling, which could indicate a failure in the septic system.

The other concepts mentioned in the incorrect options do not describe seepage accurately. For example, the movement of liquids into tanks is a part of the initial stage of septic system operation rather than the seepage process itself. The movement of gases and waste storage pertains to other aspects of septic systems, but they do not define seepage.