From the looks of it here I'm the only professional OHS person in this discussion with 30+ years of OSHA compliance experience and a ton of OSHA related training including an BS in Occupational Health & Safety. Do what you want but here's the thing, move him, pander to him, or forget him totally, regardless of what you do, you now know and from this point forward you can start facing potential US OSHA Egregious violations and penalties. All your person has to do is call 1-800-321-6742 (which you are by law required to provide him) and file a complaint and possibly claim imminent health hazard to initiate the OSHA inspection process, once that's done all bets are off and lack of positive action on your part can become a humbling experience.