How deep were the 6" holes that the contractor drilled and filled with concrete? I'm thinking to drill much smaller holes, maybe 1 1/4" diameter, through the concrete at strategic places and pound in 3 or 4 foot long pieces of 1" diameter rebar down below the top surface of the concrete and then fill in the holes with concrete level with the top surface so the repair isn't visible. Hard to believe that wouldn't stabilize it. It would be relatively inexpensive and something you easily could do yourself.
The depth of the holes is something I don't know But if memory is correct I'd say3.5 -4 ft.
And you r suggestion or something along those lines was another thought I had but not sure about how far to go down, the cost, finishing, possible long term issues (cracking etc.) I'm still working 7 days a week trying to get caught up on commitments I made to customers over a year ago. So my doing it is not possibly at this time
BTW,
NEVER TREAT AN EMPLOYEE AS ANYTHING MORE THAN A TOOL
