Collected from a harbour in Nova Scotia.Polycyclic Aromatic Compounds mg/kg (ppm) Polycyclic Aromatic Compounds mg/kg (ppm)of dry sediment of dry sedimentNaphthalene . 4.1 ± 1.1 Benzo(a)anthracene. 1.8 ± 0.3Acenaphthylene . 0.19 ± 0.05 Chrysene . 2.0 ± 0.