title: Acute toxicity of runoff from sealcoated pavement to Ceriodaphnia dubia and Pimephales promelas.
abstract: Runoff from coal-tar-based (CT) sealcoated pavement is a source of polycyclic aromatic hydrocarbons (PAHs) and N-heterocycles to surface waters. We investigated acute toxicity of simulated runoff collected from 5 h to 111 days after application of CT sealcoat and from 4 h to 36 days after application of asphalt-based sealcoat containing about 7% CT sealcoat (AS/CT-blend). Ceriodaphnia dubia (cladocerans) and Pimephales promelas (fathead minnows) were exposed in the laboratory to undiluted and 1:10 diluted runoff for 48 h, then transferred to control water and exposed to 4 h of ultraviolet radiation (UVR). Mortality following exposure to undiluted runoff from unsealed asphalt pavement and UVR was ≤10% in all treatments. Test organisms exposed to undiluted CT runoff samples collected during the 3 days (C. dubia) or 36 days (P. promelas) following sealcoat application experienced 100% mortality prior to UVR exposure; with UVR exposure, mortality was 100% for runoff collected across the entire sampling period. Phototoxic-equivalent PAH concentrations and mortality demonstrated an exposure-response relation. The results indicate that runoff remains acutely toxic for weeks to months after CT sealcoat application.
authors: †U.S. Geological Survey, 1505 Ferguson Lane, Austin, Texas 78754, United States.
authors: Barbara J
authors: BJ
authors: Mahler
authors: ‡U.S. Geological Survey, 4200 New Haven Rd., Columbia, Missouri 65201, United States.
authors: Christopher G
authors: CG
authors: Ingersoll
authors: †U.S. Geological Survey, 1505 Ferguson Lane, Austin, Texas 78754, United States.
authors: Peter C
authors: PC
authors: Van Metre
authors: ‡U.S. Geological Survey, 4200 New Haven Rd., Columbia, Missouri 65201, United States.
authors: James L
authors: JL
authors: Kunz
authors: ‡U.S. Geological Survey, 4200 New Haven Rd., Columbia, Missouri 65201, United States.
authors: Edward E
authors: EE
authors: Little
mesh_terms: D000818:Animals; D033361:Cladocera / Q000187:drug effects*; D003033:Coal Tar / Q000633:toxicity*; D003530:Cyprinidae / Q000502:physiology*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical; D003033:Coal Tar