Georgia Septic Installer Practice Test

What is the minimum earth cover required over absorption lines?

1. 2-6 inches

2. 6-12 inches

3. 12-18 inches

4. 18-24 inches

The correct answer is: 6-12 inches

The minimum earth cover required over absorption lines is established to ensure that the system functions properly while preventing damage to the components. A cover of 6-12 inches provides adequate protection for the absorption lines while allowing for sufficient soil aeration and drainage. This depth minimizes the risk of surface disturbances affecting the lines, maintaining the integrity of the system. With a cover of this range, it also strikes a balance between protecting the system from freeze damage in colder climates and allowing for proper treatment and dispersal of effluent. A cover that is too shallow risks exposing the lines to potential damage from external factors, whereas a cover that is too deep may hinder the system's ability to function effectively due to increased pressure on the absorption lines. Therefore, the choice of 6-12 inches as the minimum depth reflects appropriate design parameters for optimal performance of the septic system.