Arrived at home. Sanitary sewer has been partially replaced. Issue the homeowner is having is the sanitary sewer at point of connection to city main has an extensive belly in the line which is holding water. Excavation and replacement of compromised piping will need to happen. Trenchless options I believe will not fix low spots or backgraded piping since the new piping follows the same path as the existing piping. I will return and camera the sanitary sewer to pinpoint exact location of sewer tap. This will need to be done before an estimate is given. Will be in contact with Kunwar on day and time.