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Date: 2006-01-12 15:14:04Medicine Astrochemistry Carcinogens Origin of life Petroleum products Coal tar Sealcoat Polycyclic aromatic hydrocarbon Aromatic hydrocarbon Chemistry Coal Environment | pahs.pete.graphic.OH conc log scale usgs3Add to Reading ListSource URL: pubs.usgs.govDownload Document from Source WebsiteFile Size: 516,63 KBShare Document on Facebook |