Our house was begining to smell of sewage. I went to the basement to discover that there was a puddle on the floor. I looked for where it was coming from and found that it was leaking in from around the outside of the drain pipe leaving the 50 year old house. I've searched the net to find answers on drain field problems and came up empty. I don't know if the whole system failed or if there is a clog or broken pipe or if it's because of the ice rink and frost causing over saturated soil. For now all i'm doing is digging down on the outside and taring around the pipe.Have you any suggestions? I'll let you know what i find.