Can anyone give me a rough idea on the distance from a 4" diameter inspection pipe to the septic tank cover on a 1000 gallon tank? I've got such a setup at my house where I can see the inspection pipe protruding out from the ground roughly 10-12' from the house foundation and I was trying to get an idea as to how far from that pipe do I have to start digging around for the cover.
Thanks in advance.