Primary and secondary pollutant removal mechanisms

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BMP group	Pollutant removal mechanisms
	Water quality						Water quantity>
	Screening/filtration	Infiltration/recharge	Settling	Biological uptake	Temperature control	Soil adsorption	Volume control	Rate control	Velocity control	ETa
Pollution prevention	Not applicable - pollutants not exposed to stormwater
Better Site Design/low impact development
Runoff volume minimization
Temporary construction sediment control
Bioretention
Filtration									X
Infiltration
Stormwater ponds
Stormwater wetlands
Supplemental treatment	Each supplemental and proprietary device should be carefully studied to learn the primary and secondary removal functions