Chemical:
1,3-Butadiene, Acetaldehyde, Benzene, Benzo[a]pyrene, Benzo[b]fluoranthene, Benzo[j]fluoranthene, Benzo[k]fluoranthene, Benz[a]anthracene, Carbon monoxide, Chrysene, Diesel engine exhaust, Formaldehyde (gas), Gasoline engine exhaust (condensates/extracts), Indeno [1,2,3-cd]pyrene, Lead, Soots, tars, and mineral oils (untreated and mildly treated oils and used engine oils), Toluene, Unleaded gasoline (wholly vaporized)