[Zeke]

Looks like the slab is on a slope. I see 10K worth of work completed (or so). But the 20 x 30 vs. 20 x 40 thing sounds like a gross mistake on his part. Better go back and check the plans and see who's right.

I remember reading about a contractor that built a house 180 degrees from the intended orientation. I guess they salvaged the foundation and reworked the floor plan to achieve the desired layout. All of this was at the contractor' expense, of course.