ABSTRACT
The buildup and removal of pollutants is a continuous process occurring over both dry and wet periods, with rainfall washing off the pollutants that have built up. Sampling of runoff from both sets of four pavements was subsequently carried out, and the analytical results used to estimate the flux of 23 contaminants including heat. Asphalt paving, concrete curbs and impervious gutters are efficient collectors and conveyors of contaminants and stressors to stormwater systems they may appeal to some people but are generally bad for aquatic ecosystems. Rainfall also transfers particulates from adjacent pervious areas, and this runoff contains high levels of bacteria, phenols, total and suspended solids, etc. Properties of the CP are such that it is expected to go to 100% impervious as the voids between the stones lock together with sand and dust. Runoff was sampled and samples analyzed using methods documented in Thompson for the chemical, biological, and physical parameters.
