The concrete sewer line had been cracked for years. The crew easily found it. Dave called Nelson King of D&N Plumbing (404-636-5080). Nelson came out the same day and asked if we'd dig back the metal pipe that exited the house. We asked how much it would cost to fix. Mr. Nelson said, "I have no idea. I'll tell you when we finish." They fixed it the next day in about an hour. Now we're flushing without guilt. I asked the plumber if he thought our 50 year old pipes were cracked anywhere else (like under the driveway). He said, "probably."