Selected indoor home concentrations of various semivolatile PAH compounds for 33 homes in Californiaand Ohio ranged from 9.2 to 210 ng/m3 for phenanthrene, 0.29 to 1100 ng/m3 for quinoline, 2.40 to 37.4 ng/m3 for fluoranthrene, and 0.00 to 4.13 ng/m3 for benzo[a]pyrene . Concentrations were higher in homes with tobacco smoking. Phenanthrene, for example, was…