How is it any different than undisturbed? Yes, I know, don't disturb it, etc., that releases fibers, etc., should be untouched, etc., etc.... it's a likely/possibly/certainly ACM, etc. to infinity. The risk for everyone, imho, isn't health related....we're exposed to hundreds or thousands of various microfibers and toxins on a daily basis and this is just one more. The risk is someone freaking out, losing their investment possibilities, or otherwise tanking their house as an investment/safe haven, with the fault laying with the errant home inspector that maybe didn't report it. The only way to accurately and precisely answer your question is subject the house to air sampling. That ain't happening. At least, not in my experience. Personally, I'd report it as vermiculite and it's possibility/likelihood/certainty that it's an ACM, note it was disturbed, run them through the usual discussions and recommendations, and move on to the next item. I'd probably also say a few quiet prayers and genuflections for them to not buy the thing. From the mess I'm seeing in the pictures, I'm guessing vermiculite is just one more item in a usual mess of a Chicago "rehab".