I have a seasonal cabin (May-Oct) in the Adirondack mountains that has the original septic system circa 1970. Each year when I open the camp I add digester to the system and about 10 years ago I separated the gray water from the system so only the toilet and bathroom sink go to the system. A prospective buyer wants an inspection done. I'm not sure why as we never had an issue besides the usual clogged toilet. As the tank is buried in the back lot it would be a task to even locate it. Any suggestions on testing or alternatives? The cabin is in the Adirondack Park so replacement would cost almost as much as the cabin is worth due to a very strict code for lake front septic systems.