Prompt: Explain the process for establishing the line
and grade for a sanitary sewer line connection to an
existing municipal sanitary manhole. Include the type
of sewer flow, the importance of the pipe invert and
reach of the sewer in determining the slope of the
pipe, factors that determine the use of manholes,
the use of batter boards and offset stakes, minimum
ground cover required. In addition, discuss the use of
visual aid such as field notes and a simple plan and
profile drawing in establishing the line and grade.