The illustration involves impervious cover and represents several best management practices (BMPs) some of which will be covered later in the presentation.
	A great menu of BMPs for Phase II can be found at this USEPA website: http://www.epa.gov/npdes/menuofbmps/menu.htm.  This source contains information on the Phase II rule, requirements and BMP fact sheets.
	Another source of information on urban storm water best management practices can be found at this USEPA website: http://www.epa.gov/ost/stormwater/