Primary and secondary volume removal mechanisms
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Primary and secondary volume removal mechanisms

This table shows a list of BMPs and associated volume removal mechanisms. Primary (removal) means the BMP was designed for this specific mechanism. Secondary (removal) means the BMP provides additional removal of pollutants for this mechanism even though the BMP was not designed for that purpose. An empty cell means the BMP provides limited or no removal for that mechanism.
Link to this table.

BMP group	Volume removal mechanisms
	Water quality				Water quantity
	Volume control	Rate control	Velocity control	ET^a
Pollution prevention	Not applicable
Better Site Design/low impact development	primary	secondary	secondary	secondary
Runoff volume minimization	primary	secondary
Temporary construction sediment control		primary	secondary
Bioretention	secondary	secondary		secondary
Filtration		secondary		secondary
Infiltration	secondary	secondary
Stormwater ponds		primary	primary	secondary
Stormwater wetlands		primary	primary	secondary