Underground sedimentation systems for treatment of highway runoff in dense city areas

T.J.R. Pettersson, A.-M. Str\303\266mvall & S. Ahlman
The pollutant characterization, removal efficiency and function of a newly constructed underground sedimentation system for treatment of highway runoff have been investigated. Results from flow weighted sampling, during eight consecutive storm events, show a high inflow of heavy metals and carcinogenic PAHs. The concentrations of carcinogenic PAHs in the inlet water exceeded the Swedish guideline values for polluted groundwater at petrol stations. The relatively high amounts of specific PAHs such as pyrene, fluoranthene, chrysene, and...
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