Building occupants
Benzene from tobacco smoke (ETS) and attached garages, limonene (a terpene) and various siloxane compounds (eg, decamethylcyclopentasiloxane)
from personal care products including antiperspirants and deodorants, tetrachloroethylene from dry-cleaned clothing, and
C12 to C16 alkanes from hand and body lotion, moisturizing soaps, and cosmetics