All priority pollutants are removed from runoff via one or more of the following pathways: adsorption or precipitation and/or complexation followed by sedimentation or filtration, volatilization, biodegradation or photolysis. The more appropriate removal mechanism may be determined by examining certain chemical parameters, especially the octanol-water partitioning coefficient Kow, Henry's law constant KH, vapor pressure and biodegradability. Best Management Practices may be divided into categories based on the pollutant removal mechanisms within the BMP. The most appropriate BMP may be selected by matching the process most likely to remove the pollutant to the removal process.

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