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Article title misstates the role of pavement sealers

Authors
Journal
Environmental Pollution
0269-7491
Publisher
Elsevier
Volume
191
Identifiers
DOI: 10.1016/j.envpol.2013.11.029
Keywords
  • Pah
  • Pavement Sealer
  • Cmb
  • Sediment

Abstract

Abstract The claim made in the title of Witter et al. (2014) “Coal-tar-based sealcoated pavement: A major PAH source to urban stream sediments” is not supported by the data presented. The author's use of Pearson correlation coefficients is insufficient to indicate causation. The application of spatial analysis and principle component analysis did not include sealer specific inputs, so provides no basis for the claim. To test the hypothesis that sealers are a source of PAHs in the stream studied, EPA's Chemical Mass Balance (CMB) source evaluation model was applied to Witter's sediment data. CMB found an excellent fit (R2 > 0.999) between measured and modeled PAH concentrations when sealers were not included as a potential source. This finding does not support Witter et al. (2014) claim that sealers are a major source of PAHs.

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