Changes

The following maintenance procedures and preventative measures should be incorporated into a maintenance plan:  

The following maintenance procedures and preventative measures should be incorporated into a maintenance plan:  

[[File:MaintenancePICP.png|frame|Vehicle used for vacuum maintenance of permeable pavements (Source: STEP). ]]

[[File:MaintenancePICP.png|thumb|400px|Vehicle used for vacuum maintenance of permeable pavements (Source: STEP). ]]

*'''Surface Sweeping''': Sweeping should occur once or twice a year with a commercial vacuum sweeping unit to mitigate sediment accumulation and ensure continued porosity. Permeable pavement should  not be washed with high pressure water systems or compressed air units, because they will push particles deeper into the pavement.<ref name=manchester2002>Philadelphia Water Department (PWD). 2007. Philadelphia Stormwater Management Guidance Manual. Philadelphia </ref>

*'''Surface Sweeping''': Sweeping should occur once or twice a year with a commercial vacuum sweeping unit to mitigate sediment accumulation and ensure continued porosity. Permeable pavement should  not be washed with high pressure water systems or compressed air units, because they will push particles deeper into the pavement.<ref name=manchester2002>Philadelphia Water Department (PWD). 2007. Philadelphia Stormwater Management Guidance Manual. Philadelphia </ref>

*'''Inlet Structures''': Drainage pipes and structures within or draining to the subsurface bedding beneath porous pavement should be cleaned out on regular intervals .<ref name=manchester2002/>

*'''Inlet Structures''': Drainage pipes and structures within or draining to the subsurface bedding beneath porous pavement should be cleaned out on regular intervals .<ref name=manchester2002/>