I think it's mold! (Now what?).
Draper
Al
A
LVI Services, Inc., New York, NY, USA.
D003666:Decontamination / Q000379:methods; D005658:Fungi; D006801:Humans; D016273:Occupational Exposure / Q000517:prevention & control*; D016272:Occupational Health; D018570:Risk Assessment / Q000379:methods; D014691:Ventilation / Q000379:methods