Sink Hole or Septic Problem
My soil is sandy loam and I noticed a huge sink hole in the back yard where the septic system is. But...I'm not sure if it is due to rain or a bad septic system. The hole has no stones in it like I relate to the laterals in a septic system, and the house doesn't show any problems with drainage, flushing, or any of that. How can I know whether this is a serious problem or not?