I am having an addition built on my home with ~600 square foot basement underneath. Because one of the basement foundation walls is very near (~1 foot) from the original home foundation, the concrete contractor is planning to leave the basement form on that outer wall (and cutting the top of the form off). I believe this is because it is too difficult to get into that small space to disconnect all of the links that hold the forms together. The original home's foundation is a slab and the forms are wood.
Is this acceptable/standard practice? What other possible solutions are there?