Parking lot sealcoat: an unrecognized source of urban polycyclic aromatic hydrocarbons.

Polycyclic aromatic hydrocarbons (PAHs) are a ubiquitous contaminant in urban environments. Although numerous sources of PAHs to urban runoff have been identified, their relative importance remains uncertain. We show that a previously unidentified source of urban PAHs, parking lot sealcoat, may dominate loading of PAHs to urban water bodies in the United States. Particles in runoff from parking lots with coal-tar emulsion sealcoat had mean concentrations of PAHs of 3500 mg/kg, 65 times higher than the mean concentration from unsealed asphalt and cement lots. Diagnostic ratios of individual PAHs indicating sources are similar for particles from coal-tar emulsion sealed lots and suspended sediment from four urban streams. Contaminant yields projected to the watershed scale for the four associated watersheds indicate that runoff from sealed parking lots could account for the majority of stream PAH loads.

[1]  J. Quinn,et al.  Urban runoff as a source of polycyclic aromatic hydrocarbons to coastal waters. , 1984, Environmental science & technology.

[2]  D. Hawker,et al.  Polycyclic aromatic hydrocarbons in air, soil and vegetation in the vicinity of an urban roadway , 1991 .

[3]  V. Ruban,et al.  Characterization of the organic matter of sludge: determination of lipids, hydrocarbons and PAHs from road retention/infiltration ponds in France. , 2004, Environmental pollution.

[4]  M. C. Olson,et al.  Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of polycyclic aromatic hydrocarbon compounds in sediment by gas chromatography/mass spectrometry , 2004 .

[5]  H. Takada,et al.  Distribution and sources of polycyclic aromatic hydrocarbons (PAHs) in street dust from the Tokyo Metropolitan area. , 1991, The Science of the total environment.

[6]  M. Heit.  The relationship of a coal fired power plant to the levels of polycyclic aromatic hydrocarbons (PAH) in the sediment of Cayuga Lake , 1985 .

[7]  Peter C. V An M Etre,et al.  Urban Sprawl Leaves Its PAH Signature , 2000 .

[8]  Andreas Krein,et al.  ROAD RUNOFF POLLUTION BY POLYCYCLIC AROMATIC HYDROCARBONS AND ITS CONTRIBUTION TO RIVER SEDIMENTS , 2000 .

[9]  Anwar Jiries,et al.  Vehicular Contamination of Dust in Amman, Jordan , 2003 .

[10]  C. Dimock,et al.  Origins of polycyclic aromatic hydrocarbons in estuarine sediments , 1979 .

[11]  B. Mahler,et al.  A Simplified Approach for Monitoring Hydrophobic Organic Contaminants Associated with Suspended Sediment: Methodology and Applications , 2003, Archives of environmental contamination and toxicology.

[12]  R. Eganhouse,et al.  Historical deposition and biogeochemical fate of polycyclic aromatic hydrocarbons in sediments near a major submarine wastewater outfall in southern California , 1990 .

[13]  M. Fishman,et al.  Methods for determination of inorganic substances in water and fluvial sediments , 1989 .

[14]  B. Mahler,et al.  Concentrations of Polycyclic Aromatic Hydrocarbons (PAHs) and Major and Trace Elements in Simulated Rainfall Runoff From Parking Lots, Austin, Texas, 2003 , 2004 .

[15]  R. Brenner,et al.  Characterization and FATE of PAH-contaminated sediments at the Wyckoff/Eagle Harbor Superfund Site. , 2002, Environmental science & technology.

[16]  D. W. Bryant,et al.  Chemical and biological profiles of sediments as indicators of sources of genotoxic contamination in Hamilton Harbour. Part I: analysis of polycyclic aromatic hydrocarbons and thia-arene compounds. , 2000, Chemosphere.

[17]  J. Grimalt,et al.  Gas chromatographic-mass spectrometric characterization of polycyclic aromatic hydrocarbon mixtures in polluted coastal sediments , 1992 .

[18]  Nancy J. Hornewer,et al.  Sources of contamination in an urban basin in Marquette, Michigan and an analysis of concentrations, loads, and data quality , 1997 .

[19]  R. Macdonald,et al.  PAHs in the Fraser River basin: a critical appraisal of PAH ratios as indicators of PAH source and composition , 2002 .

[20]  D. Macdonald,et al.  Development and Evaluation of Consensus-Based Sediment Quality Guidelines for Freshwater Ecosystems , 2000, Archives of environmental contamination and toxicology.

[21]  Hideshige Takada,et al.  Determination of polycyclic aromatic hydrocarbons in urban street dusts and their source materials by capillary gas chromatography , 1990 .

[22]  Franklin T. Heitmuller,et al.  Occurrence, trends, and sources in particle-associated contaminants in selected streams and lakes in Fort Worth, Texas , 2003 .

[23]  Glen R. Cass,et al.  SOURCES OF FINE ORGANIC AEROSOL. 3. ROAD DUST, TIRE DEBRIS, AND ORGANOMETALLIC BRAKE LINING DUST: ROADS AS SOURCES AND SINKS , 1993 .

[24]  R. Eganhouse,et al.  Extractable organic matter in urban stormwater runoff. 1. Transport dynamics and mass emission rates. , 1981, Environmental science & technology.