Yup, there's the plumbing.
June 6 & 7, 1996
The plumbers came and installed the sewer and water
lines. They dug trenches in the fill and laid the pipes in the
trenches. They had to punch a couple of holes through the
perimeter concrete walls. The sewer and water access locations
were then marked on the concrete walls, (essentially scratched
on), and then the pipes were buried. This is really a one day job
but there was an afternoon rain, big surprise, that slowed things
down.