Which type of sewer system is used for conveying rain water, surface water, ground water, or condensation from the building storm drain to an approved point of discharge?

Which type of sewer system is used for conveying rain water, surface water, ground water, or condensation from the building storm drain to an approved point of discharge?

• A. Combined Sewer
• B. Storm Sewer System
• C. Sanitary Sewer
• D. Roof Drain System

Answer: (B)

The main idea is that rainwater and other precipitation-driven waters are kept separate from sanitary waste and guided through a dedicated system designed to move stormwater away from the building to an approved discharge point. A storm sewer system is built specifically to carry rainwater, surface water, groundwater, and condensation from the building’s storm drain to that discharge point, such as a municipal stormwater system or an outfall. This separation helps prevent overloading the sanitary sewer during storms and reduces the risk of backflow or flooding of fixtures. In contrast, a combined sewer handles both sanitary waste and stormwater in one set of pipes, which can overflow during heavy rain. A sanitary sewer carries only wastewater from plumbing fixtures. A roof drain system is focused on collecting roof runoff and is typically part of the overall storm drainage but does not by itself describe the entire building’s stormwater conveyance. Therefore, the system designed to convey all forms of stormwater to an approved discharge point is the storm sewer system.

The main idea is that rainwater and other precipitation-driven waters are kept separate from sanitary waste and guided through a dedicated system designed to move stormwater away from the building to an approved discharge point. A storm sewer system is built specifically to carry rainwater, surface water, groundwater, and condensation from the building’s storm drain to that discharge point, such as a municipal stormwater system or an outfall. This separation helps prevent overloading the sanitary sewer during storms and reduces the risk of backflow or flooding of fixtures.

In contrast, a combined sewer handles both sanitary waste and stormwater in one set of pipes, which can overflow during heavy rain. A sanitary sewer carries only wastewater from plumbing fixtures. A roof drain system is focused on collecting roof runoff and is typically part of the overall storm drainage but does not by itself describe the entire building’s stormwater conveyance. Therefore, the system designed to convey all forms of stormwater to an approved discharge point is the storm sewer system.