Good morning and thank you all for you input and inquiries.
Speaking with a few people about the little, itsy-bitsy, super-tiny white things that are slowly moving around in the tenants kitchen, the general consensus is that they are bird-mites.
When writing the original post I had no idea or guesses as to what they could be, never seen them before. However a couple of hours from now we’ll have trained eyes on them and a solution in the works. For that apartment and all the others in the building.
Again thanks for your help and stay cool during this extra-warm weekend.