Georgia Septic Installer Practice Test

What percentage of the required liquid capacity should a compartmented septic tank be?

1. 50%

2. 75%

3. 66.67%

4. 80%

The correct answer is: 66.67%

A compartmented septic tank should have a required liquid capacity of 66.67% to effectively function. This specific percentage allows for the proper separation of solids, liquids, and scum, contributing to the overall efficiency of the treatment process. Each compartment plays a crucial role in enhancing treatment by allowing the liquid waste to settle appropriately and facilitating better anaerobic digestion. Using this two-thirds capacity ensures that enough space is available for the wastewater to flow through while providing adequate time for the solids to settle and for bacteria to break down the organic matter. The design also helps minimize hydraulic overloading, which can lead to system failure. Thus, the 66.67% standard aligns with best practices in septic system design, helping to maintain effective treatment and longevity of the system.