Other notable frequent detections included several industrial Pahs known to cause cancer, polychlorinated biphenyls(PCBs),
and highly hazardous pesticides such as the wood preservative pentachlorophenol and long-banned chlordane.
While being toxic to marine life, polycyclic aromatic hydrocarbons(Pahs), found in crude oil,
are very difficult to clean up, and last for years in the sediment and marine environment.