Hi everyone! Thanks so much for the responses- My teaching job started back and I was snowed with work!! The builder has since filled the crack with epoxy- 10,000 pound epoxy---Upon seeing the responses, I did contact our city inspection department- the inspector came out- he stated the area should be double rebarred and blocks should be filled with concrete- the builder stated that was exactly what he was going to do , if I would have given him time. Also the inspector sent out a structural engineer, which happened to be the same engineer that we used on the house plan. The structural engineer gave us a letter which I attached. So... the builder did the repair as requested...the slab is poured and the inspector came back a second time and said it looked great. I hope he's right!!!!