Texas Commission on Environmental Quality (TCEQ). Class C Water License Exam

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What is the recommended capacity for ground storage based on providing adequate service?

2 to 3 hours at 150 gallons per connection
4 to 6 hours at 200 gallons per connection
6 to 8 hours at 250 gallons per connection
1 to 2 hours at 100 gallons per connection

The correct answer is: 4 to 6 hours at 200 gallons per connection

The recommended capacity for ground storage is determined by the need to ensure that there is sufficient water available to meet peak demand while also maintaining adequate service levels. The choice representing 4 to 6 hours at 200 gallons per connection aligns well with the industry standards typically used for water supply systems. This duration allows for an adequate reserve that can handle expected variations in water demand throughout the day, particularly during peak usage periods such as mornings and evenings when households typically consume more water. Additionally, the figure of 200 gallons per connection provides a reasonable estimate based on average water usage patterns, taking into consideration factors such as household size and water consumption behaviors. In contrast, the other options may either underestimate the duration or the volume of water needed, potentially leading to insufficient supply during high-demand periods. Therefore, the choice of 4 to 6 hours at 200 gallons per connection reflects a balance between customer needs and system reliability.