Georgia Septic Installer Practice Test

What is the minimum ultimate tensile strength of a polyethylene septic tank?

1. 1200 psi

2. 2000 psi

3. 2400 psi

4. 3000 psi

The correct answer is: 2400 psi

The minimum ultimate tensile strength of a polyethylene septic tank is indeed 2400 psi. This specification is essential because it ensures that the material used for the tank can withstand the stresses applied to it, especially when it is buried underground and subjected to soil pressure, water table fluctuations, and other environmental factors. Ultimate tensile strength is a crucial property of materials, indicating the maximum amount of tensile (stretching) stress that they can endure before failure. For polyethylene, achieving a tensile strength of 2400 psi means that the tank will have sufficient durability and integrity over its expected lifespan, reducing the risk of cracking or failure under load. This standard reflects the importance of using materials that are not only resilient but also compliant with industry regulations and best practices, which are designed to ensure the safe and effective operation of septic systems.