Georgia Septic Installer Practice Test

Which material is commonly used for constructing septic tanks mentioned in the text?

1. Plastic

2. Fiberglass

3. Wood

4. Concrete

The correct answer is: Concrete

Concrete is commonly used for constructing septic tanks due to its durability, strength, and resistance to environmental factors. Concrete tanks are less susceptible to damage from soil movement or settling, which is crucial for ensuring the long-term functionality of a septic system. Additionally, concrete can withstand a variety of chemicals typically found in wastewater, making it a reliable choice for containing and treating sewage. While alternatives like plastic and fiberglass have their benefits, such as lighter weight and easier installation, they may not offer the same level of structural integrity and longevity as concrete tanks. Wood, on the other hand, is not suitable for septic tank construction because it can deteriorate over time when exposed to moisture and chemicals in wastewater. Therefore, concrete remains the most commonly used material for septic tank construction in many installations.