Chemical:
Benzo[a]pyrene, Benzo[b]fluoranthene, Benzo[j]fluoranthene, Benzo[k]fluoranthene, Benz[a]anthracene, Carbazole, Chrysene, Dibenz[a,h]anthracene, Dibenz[a,j]acridine, Indeno [1,2,3-cd]pyrene, Soots, tars, and mineral oils (untreated and mildly treated oils and used engine oils)