What are percolation tests used for?

Percolation tests are an essential part of the site evaluation process for septic system installations. These tests help determine the absorption capabilities of the soil, which is crucial for the proper functioning of a septic system. By assessing how quickly water moves through the soil, a percolation test provides insight into whether the soil can adequately filter and absorb the effluent from a septic system.

The results from the percolation test indicate not only the suitability of the site for installation but also play a significant role in sizing the system, ensuring that it can be designed to handle the anticipated wastewater flow efficiently. If a site has poor percolation rates, it may not support a septic system without further interventions or modifications.

In contrast, determining the amount of water in the soil focuses on soil moisture content, assessing soil temperature does not directly relate to the functionality of septic systems, and testing soil for contamination addresses environmental concerns but is not specific to septic system suitability. Thus, option B accurately captures the primary purpose of percolation tests in the context of septic systems.