Georgia Septic Installer Practice Test

If a garbage grinder is used, what is the requirement for septic tank capacity above the standard?

1. 25% greater

2. 50% greater

3. 100% greater

4. No change required

The correct answer is: 50% greater

When a garbage grinder is used in conjunction with a septic system, the requirement for the septic tank capacity is specified to be 50% greater than the standard size. The rationale behind this increase is that garbage grinders introduce a substantial amount of additional organic material and solids into the septic system, which can affect the digestion process and the overall capacity of the tank. Septic tanks are designed to hold wastewater long enough for solids to settle and for the biological processes to break down organic matter. The use of a garbage grinder increases the volume of solids entering the system. To effectively manage this additional load without overwhelming the septic system, it is essential to increase the tank size. A septic tank that is 50% larger provides sufficient space to accommodate the extra waste, allowing for better treatment and reducing the risk of system failure. This adjustment helps ensure that the septic system can function properly and maintain effective wastewater treatment, preventing issues such as backups or odors that could arise from an overloaded system.