Quote Originally Posted by ed21 View Post
I seems to me that smoke would have no place to go except up a vent since the septic & cleanouts are buried.
A metal detector might find a cleanout if there is any cast iron.
The building department should have a record on file from when the house was permitted
5 years is probably too long between pump outs
You can bet the septic cover isnt air tight.It's probably covered with dirt. The smoke will find the cracks around the cover.