There is no guarantee that a survey finds it.
From my research, only core sampling is really the only test that can confirm it, except that sometimes pulling a few well dispersed thru hulls might.
Not to scare anyone, just what I have researched.
Like medical issues...no real need to worry unless symptoms like strange blistering or bad tapping or high moisture content (all inconclusive by themselves) plus the history of the boats life might make one suspicious to investigate further.