Texas Wastewater Class B Practice Exam

What is the major advantage of using fiberglass manholes in areas with high groundwater?

1. Enhanced structural integrity

2. Resistance to corrosion

3. Fiberglass is not subject to infiltration

4. Lower overall cost

The correct answer is: Fiberglass is not subject to infiltration

The major advantage of using fiberglass manholes in areas with high groundwater is that fiberglass is not subject to infiltration. This property is particularly important in such environments because it helps prevent groundwater from entering the wastewater system, which can disrupt operations, dilute wastewater, and potentially lead to treatment challenges. The impermeability of fiberglass reduces the risks associated with infiltration, such as contamination and system overload. Additionally, while other materials may be affected by groundwater conditions, fiberglass maintains its integrity and functionality, making it a reliable choice for maintaining a secure and efficient waste management system in challenging environmental circumstances. Moreover, even though factors such as corrosion resistance and structural integrity play a role in material choice, the primary concern in high groundwater areas is the likelihood of infiltration, which fiberglass effectively mitigates.