What are these things?

[Frank J. Carey]

Were there any floor drains for the basement? I would say rough in for the plumbing, but the other waste lines in pic #2 look like ABS. Passive radon would typically be found against an exterior wall, and usually only one is needed (not a radon mitigation expert). I would think that if there are no other forms of drains cut in the floor (french, etc.), then they were preparing for floor drains where the sump would be used and be efficient right next to one of the drains. I am not sure why they were left like that though...much harder to saw cut then cover and pour around...