Catch-22?

Rob- I have not run into that situation before (thankfully the corrections I've had to do on projects have been pretty minor), so I unfortunately do not have any guidance specifically from GBCI. Since it sounds like you can't really do any more than you have already done, I would recommend that you just submit the documentation including the steps you have supplied above and see if it gets accepted.

'Corrective action' is loosely defined - I think the expectation is simply that you take meaningful steps that you think will remedy the problem. It doesn't require massive changes or investment, and sometimes simply explaining the situation and helping occupants or tenants adapt to it is enough. But there is some obligation to make a sincere effort to fix the situation that resulted in occupant discomfort. I think your description is likely to meet that requirement, especially if you can show what exactly your offer to help represents.