Sewage cleanup and restoration is a process that should be handled with care. There are a few key steps that should be taken in order to ensure that the process is done correctly. First, it is important to identify the source of the sewage. This can be done by looking for signs of sewage such as a strong odor or discolored water. Once the source is found, it is important to turn off the water to the affected area. This will prevent further contamination. Next, all affected materials must be removed. This includes carpet, padding, drywall, and insulation. These materials can be disposed of in a sealed bag or container. Finally, the area must be cleaned and disinfected. A professional should be contacted if the area is large or if there are multiple affected areas.
https://www.cdc.gov/healthywater/emergency/sewage_cleanup.html
https://www.epa.gov/sites/production/files/2015-09/documents/sewage_backups_fs.pdf
https://www.angieslist.com/articles/guide-sewage-cleanup.htm