Over the Summer, I've been using my office at an aging University building about once a week. Last week, I arrived and opened one drawer in my desk to find the desk top, inside and the lips of the drawer scattered with a mixture of white and dark brown pellets
, each about 1-2mm in size. The pellets crumble smoothly into powder when pressed with a thumbnail. They have a faintly chemical odor. What are they??
Possible relevant facts: The building has a known roach problem. Maintenance has access to the office, but aside from emptying the waste basket, has not been doing any work in here. The ceiling appears to be popcorn plaster, but is not joined to the cinder block walls at the edges above the desk. There is a crawlspace then rotting roof above the ceiling.
Obviously, I am suspecting this might be roofing material, asbestos, or albino roach poo.