Tenet stated that the sewer system in the house is leaking. Crawl space is flooded with sewage. Found an active section of cast iron that has corroded all the way through. There have been multiple spots replaced in the past in the crawlspace and I can see multiple other spot with slight leaks and spot that look like they can be leaking in the near future. Highly recommend replacing all of the cast iron in the crawl space. Built an estimate to replace the section activity leaking and flooding crawl space and need to revise the estimates with Robert before submitting to resi. Could not perform full safety inspection due to crawl space being flooded and main shut off and PRV being in the crawlspace. Job is not completed.