On the basis of published guidelines, urban stormwater sediments do not appear to constitute a major regional environmental problem with respect to the chemical characteristics investigated here. At individual sites, high concentrations of organic compounds—chlordane, dieldrin, PCBs, and toxaphene—may require some attention. The possible environmental hazard presented by low-level organochlorine contamination is not addressed in this paper; however, high levels of toxicity in urban sediments are difficult to explain. Sediment toxicity varied significantly with time, which indicates that these tests should be evaluated carefully before they are used for management decisions.
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Parker, J., Fossum, K. & Ingersoll, T. Chemical Characteristics of Urban Stormwater Sediments and Implications for Environmental Management, Maricopa County, Arizona. Environmental Management 26, 99–115 (2000). https://doi.org/10.1007/s002670010074
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DOI: https://doi.org/10.1007/s002670010074