What type of survey would best identify system problems needing rehabilitation?

The best option for identifying system problems needing rehabilitation is a sanitary wastewater physical survey. This type of survey involves a thorough examination of the physical components of the wastewater system, including pipes, pumps, and treatment facilities. It typically involves direct observation, measurement of physical attributes, and sometimes the use of technology to detect issues such as leaks, blockages, or deterioration.

A sanitary wastewater physical survey provides detailed insights into the actual condition of the system, allowing operators and engineers to assess structural integrity, identify weaknesses, and prioritize areas for rehabilitation. This approach goes beyond just evaluating performance data or customer complaints, enabling a proactive maintenance strategy that aims to prevent failures rather than just responding to them.

In contrast, while visual inspections may offer a preliminary overview, they might miss more subtle or hidden issues that a physical survey is equipped to uncover. Regular maintenance surveys typically focus on documenting routine tasks and may not delve deep enough into systemic problems. Customer feedback surveys can provide information on perceived issues from the user perspective but do not give a complete picture of the physical condition of the system or specific technical problems that need addressing.