I hope the Plumbers Forum guys don't see these pics.
Why the big galvanized tank? I don't see any purpose for it.
If it were for retention, you should have seperated the in and out pipes a little more than you did. Like going in the bottom and coming out the top.
I didn't see the well, but I see an above ground pump and a strange looking fitting in the front of the first picture that I don't recognize.