What does the collection system primarily consist of?

The collection system is primarily concerned with the conveyance of wastewater from its source to treatment facilities. It comprises various components, including pipes, manholes, and structures that work together to transport wastewater efficiently. Pipes are vital as they form the network that carries wastewater through gravity flow or pumping. Manholes provide access points for maintenance and inspection, ensuring that the system operates effectively and any blockages can be addressed. Additionally, other structures may include catch basins and diversion structures, which aid in managing the flow and integrity of the system.

Understanding that the collection system focuses on the physical infrastructure necessary for transporting wastewater clarifies why this answer is the most appropriate choice. The other options, while related to the broader wastewater management process, do not specifically define the collection system in its primary context.