My wife and I are considering construction of a two car detached garage in our backyard. Our septic system is also in the backyard. I *THINK* the new garage could be located such that it would not interfere with the septic system. I think.
Our lot is only 1/2 acre and the way the lot lines are located and the way the house is situated, there is only one reasonable place to locate the garage, which puts it at least on the border of the septic field.
The house is old construction, 50 years old, and has the original septic system (which was pronounced in good shape by the guys who pumped it out last spring.) So my guess is that maps, plans, etc as well as the original plumber or septic company are loooong since gone.
Last thing I want to do is to trash out the leach field by construction so that we are in for another $7-$8K in redoing the septic system.
I checked out some old NG articles via Google. The best DIY technique seemed to be this one:
Another guy in this thread suggested flushing barium enema down the toilet and using a geiger counter to find the lines, but somehow, I don't think I want to deal with Homeland Security's guys on this one. (LOL)
Now, do septic construction or maintenance companies have other, more reliable tools for doing this?