Has this person ever spent several hours sealed into a Tyvek suit or wearing a properly fitting N95? It's tremendously uncomfortable and can lead to significant dehydration (presumably there will be no eating or drinking). Inexperienced wearers end up doing a lot of adjusting/touching of the face and eyes, which renders the whole thing moot. And in order to get full hazardous materials protection, you'd really need a sealed hood (otherwise the head/ears/neck will be exposed) and a second person to help you don/doff the gear (doffing PPE improperly pretty much redistributes all of the gunk on the PPE back into the environment).