Changes

{{float right|[[File:PP IWS.gif|border|'''Click! I'm a gif!''' <br> Conceptual diagram illustrating an adjustable storage underdrain configuration beneath permeable interlocking pavers]]}}

[[File:PP IWS.gif|frame|Conceptual diagram illustrating an adjustable storage underdrain configuration beneath permeable interlocking pavers]]

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==Overview==

==Overview==

===Risk of Groundwater Contamination===

===Risk of Groundwater Contamination===

*Stormwater infiltration practices should not receive runoff from high traffic areas where large amounts of [[de-icing salts]] are applied (e.g., busy highways), nor from pollution hot spots (e.g., source areas where land uses or activities have the potential to generate highly contaminated runoff such as vehicle fuelling, servicing or demolition areas, outdoor storage or handling areas for hazardous materials and some heavy industry sites)

*Stormwater infiltration practices should not receive runoff from high traffic areas where large amounts of [[de-icing salts]] are applied (e.g., busy highways), nor from pollution hot spots (e.g., source areas where land uses or activities have the potential to generate highly contaminated runoff such as vehicle fuelling, servicing or demolition areas, outdoor storage or handling areas for hazardous materials and some heavy industry sites)

*Prioritize infiltration of runoff from source areas that are comparatively less contaminated such as low traffic roads and parking areas.

*Prioritize infiltration of runoff from source areas that are comparatively less contaminated such as roofs and low traffic areas.

===Heavy Vehicle Traffic===

===Heavy Vehicle Traffic===

==Design==

==Design==

===Finish course===

===Finish course===

Consult the manufacturer for the design specifications of their product. In pervious concrete and porous asphalt systems, the concrete or asphalt mix specifications and construction procedures are key to proper functioning. These systems require well-trained and experienced contractors for installation.<br>

Consult the manufacturer for the design specifications of their product. In pervious concrete and porous asphalt systems, the concrete or asphalt mix specifications and construction procedures are key to proper functioning. These systems require well-trained and experienced contractors for installation.

===Aggregates===

 

===Foundation aggregates===

[[File:Geogitter-4.jpg|thumb|Geogrids like these are sometimes incorporated into the layers of permeable pavement foundation aggregates to provide additional stability]]

[[File:Geogitter-4.jpg|thumb|Geogrids like these are sometimes incorporated into the layers of permeable pavement foundation aggregates to provide additional stability]]

Most [[OPSS aggregates]] are not recommended for use in permeable paving systems.  

Most [[OPSS aggregates]] are not recommended for use in permeable paving systems. The exception being type 'o' with a default void ratio of 0.3.  

[[Choker layer]]

*[[Choker layer]]

[[Reservoir aggregate]]

*[[Reservoir aggregate]]

 

===Geotextile===

===Geotextile===

[[Geotextiles]] are not always necessary and may be prone to [[clogging]]. Consider using courses of finer aggregates or sand instead.

[[Geotextiles]] are not always necessary and may be prone to [[clogging]]. Consider using courses of finer aggregates or sand instead.

==Proprietary Links==

==Proprietary Links==

{{:Disclaimer}}

{{:Disclaimer}}

===Pre-cast===

===Pre-cast with joints===

*[https://unilock.com/products/driveways/eco-optiloc/?region=1 Eco-Optioc, Unilock]

*[https://unilock.com/products/driveways/eco-optiloc/?region=1 Eco-Optioc, Unilock]

*[https://oakspavers.com/products/enviro-pavers Enviro Pavers, Oaks]

*[https://oakspavers.com/products/enviro-pavers Enviro Pavers, Oaks]

*[http://nilex.com/products/pavedrain Pavedrain, distributed by Nilex]

*[http://nilex.com/products/pavedrain Pavedrain, distributed by Nilex]

*[http://santerrastonecraft.com/landscape/paving-stones/terra-flo Terra flo, Santerra]

*[http://santerrastonecraft.com/landscape/paving-stones/terra-flo Terra flo, Santerra]

*[http://www.storm-crete.com/ Stormcrete pervious pavers]

*[http://www.storm-crete.com/ Stormcrete pervious pavers]

===Poured in place===

 

===Cast in place===

*[http://www.lafarge-na.com/wps/portal/na/en/HydromediaDetailWCM_GLOBAL_CONTEXT=/wps/wcm/connectlib_na/Site_na/AllProductDataSheet_Concrete/ProductDatasheet_Concrete_1321037540751/Product_EN Hydromedia]

*[http://www.lafarge-na.com/wps/portal/na/en/HydromediaDetailWCM_GLOBAL_CONTEXT=/wps/wcm/connectlib_na/Site_na/AllProductDataSheet_Concrete/ProductDatasheet_Concrete_1321037540751/Product_EN Hydromedia]

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