Which method is not typically included in sewer testing methods?

The method that is not typically included in sewer testing methods is sewage. Sewer testing methods primarily focus on assessing the integrity and functionality of the sewer systems, which can be done through various techniques such as water inflow testing, pressure testing, and leakage testing.

Water inflow testing evaluates how much extraneous water enters the sewer system, while pressure testing checks the ability of pipes to withstand internal pressure without leaking. Leakage testing is designed to identify leaks within the system that might allow wastewater to escape or groundwater to enter.

In contrast, sewage refers to the contents that flow through the sewer system—primarily waste materials and fluids. It does not represent a testing method but rather the substance handled by the system. Therefore, sewage itself does not fit into the category of techniques used to evaluate or maintain sewer lines.