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:  

*'''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> Philadelphia Water Department (PWD). 2007. Philadelphia Stormwater Management Guidance Manual. Philadelphia, PA.</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> Philadelphia Water Department (PWD). 2007. Philadelphia Stormwater Management Guidance Manual. Philadelphia, PA.</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/>

*'''Heavy Vehicles''': Trucks and other heavy vehicles can ground dirt into the porous surface and lead to clogging. These vehicles should be prevented from tracking or spilling dirt onto the pavement. Signage and training of facilities personnel is suggested. <ref>Philadelphia Water Department (PWD). 2007. Philadelphia Stormwater Management Guidance Manual. Philadelphia, PA.</ref>

*'''Heavy Vehicles''': Trucks and other heavy vehicles can ground dirt into the porous surface and lead to clogging. These vehicles should be prevented from tracking or spilling dirt onto the pavement. Signage and training of facilities personnel is suggested. .<ref name=manchester2002/>

*'''Construction and Hazardous Materials''': Due to the potential for groundwater contamination, all construction or hazardous material carriers should be prohibited from entering a permeable pavement site•<ref>Philadelphia Water Department (PWD). 2007. Philadelphia Stormwater Management Guidance Manual. Philadelphia, PA.</ref>

*'''Construction and Hazardous Materials''': Due to the potential for groundwater contamination, all construction or hazardous material carriers should be prohibited from entering a permeable pavement site.<ref name=manchester2002/>

*'''Drainage Areas''': Impervious areas contributing to the permeable pavement should be regularly swept and kept clear of litter and debris.Flows from any landscaped areas should be diverted away from the pavement or at least be well stabilized with vegetation.   

*'''Drainage Areas''': Impervious areas contributing to the permeable pavement should be regularly swept and kept clear of litter and debris.Flows from any landscaped areas should be diverted away from the pavement or at least be well stabilized with vegetation.   

*'''Grid Pavers''': Paver or grid systems that have been planted with grass should be mowed regularly and the clippings should be removed (PWD, 2007). Water and fertilize as needed.  

*'''Grid Pavers''': Paver or grid systems that have been planted with grass should be mowed regularly and the clippings should be removed. Water and fertilize as needed. .<ref name=manchester2002/>

*'''Seal Coating''': Seal coats should never be applied to permeable pavements. Current and future owners and operations staff must be aware of permeable pavement areas and the importance of not applying any sealants. Porous asphalt and pervious concrete look very similar to their impervious versions and could be inadvertently sealed over.  

*'''Seal Coating''': Seal coats should never be applied to permeable pavements. Current and future owners and operations staff must be aware of permeable pavement areas and the importance of not applying any sealants. Porous asphalt and pervious concrete look very similar to their impervious versions and could be inadvertently sealed over.  

*'''Potholes''': For porous asphalt or pervious concrete, isolated potholes can be patched with standard patching mixes. Patching can continue until the structural integrity of the pavement has been compromised or stormwater can no longer drain to the aggregate base. Then the surface will need to be torn up and replaced.  

*'''Potholes''': For porous asphalt or pervious concrete, isolated potholes can be patched with standard patching mixes. Patching can continue until the structural integrity of the pavement has been compromised or stormwater can no longer drain to the aggregate base. Then the surface will need to be torn up and replaced.  

Construction, Maintenance. 3rd Edition. Interlocking Concrete Pavement Institute.Burlington, ON.</ref><br>

Construction, Maintenance. 3rd Edition. Interlocking Concrete Pavement Institute.Burlington, ON.</ref><br>

Annual inspections of permeable pavement should be conducted in the spring to ensure continued infiltration performance. These inspections should check for spilling or deterioration and test to whether water is draining between storms. The pavement reservoir should drain completely within 72 hours of the end of the storm event.

Annual inspections of permeable pavement should be conducted in the spring to ensure continued infiltration performance. These inspections should check for spilling or deterioration and test to whether water is draining between storms. The pavement reservoir should drain completely within 72 hours of the end of the storm event.

===References===

===References===