A ball bar test covers many different test cycles, so this is a pretty vague comment. If you proceed, and do so with caution, ask for the full ball bar analysis and when it was done.
Just for an example, spindle tram is .0005" @ 10" dia.
I can't think of a test of the top of my head where .0004" @ 2" is good, but then again, there is missing information.
Good luck on your search!