Ok I’ve begun the work. Cut lines with saw and cut a decent channel with the circular saw. Not I am taking the hammer drill to drill down and I am going all the way down in the bit and not hitting dirt. That means the spot I need is a solid 8”-10” of concrete:
Do I keep working it or just run a pipe through channel less than 12” and use existing p-trap?
I also drilled down in the plumbers box and found that it is thicker than the drill bit as well.