Is this placement safe

There is almost no clearance from the wall and only 2/3 of the unit is sitting on concrete. The other 1/3 is just loose gravel. Do I need to tell my contractor to fix the placement?

There is almost no clearance from the wall and only 2/3 of the unit is sitting on concrete. The other 1/3 is just loose gravel. Do I need to tell my contractor to fix the placement?