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{|class="wikitable"
{|class="wikitable"
|+Specifications for Stormwater Tree Trenches
|+Specifications for Enhanced Swales
|-
|-
!Material
!Material
|'''Planting Soil/ Filter Media'''
|'''Planting Soil/ Filter Media'''
|
|
* [[Topsoil|Planting soil]] - use for enhanced grass swales
* [[Topsoil|Planting soil]] - use for enhanced grass swales <br>
* [[Bioretention: Filter media|Filter Media Blend A]]
</br>
* [[Bioretention: Filter media|Filter Media Blend B]]
* [[Bioretention: Filter media|Filter Media Blend A]]<br>
* [[Sand]]
</br>
* [[Topsoil]]
* [[Bioretention: Filter media|Filter Media Blend B]]<br>
* [[Organic matter|Organic Material]] -
</br>
* [[Additives]] - Should be material low in available phosphorus such as leaf and yard waste compost, untreated woodchips, shredded paper or coir.
* [[Sand]]<br>
* [[Grain size analysis|Particle-size distribution]]
</br>
* [[Phosphorus|Other Parameters - Phosphorus (Plant Available or Extractable)]]
* [[Topsoil]]<br>
</br>
* [[Organic matter|Organic Material]]<br>
</br>
* [[Additives]] - Should be material low in available phosphorus such as leaf and yard waste compost, untreated woodchips, shredded paper or coir.<br>
</br>
* [[Grain size analysis|Particle-size distribution]]<br>
</br>
* [[Phosphorus|Other Parameters - Phosphorus (Plant Available or Extractable)]]<br>
</br>'''
|
|
* For Planting Soil - hydraulic conductivity, saturated (ASTM D2434) at 85% maximum dry density (ASTM D698) should be of 15 - 300 mm/h.
* For Planting Soil - hydraulic conductivity, saturated (ASTM D2434) at 85% maximum dry density (ASTM D698) should be of 15 - 300 mm/h.
* Enhanced grass swales may be planted with sod or seed.
* Enhanced grass swales may be planted with sod or seed.
**If using seed, stabilize swale with [[erosion control blankets]].
**If using seed, stabilize swale with [[erosion control blankets]].
** Bioswale planting plans should feature a mixture of deeply rooting perennials adapted to both wet and dry conditions and
** Bioswale planting plans should feature a mixture of deeply rooting perennials adapted to both wet and dry conditions and local climate.
local climate.
** If using a native seed mix, include a cover crop of oats, winter wheat, or rye to stabilize the swale in the short term.
** If using a native seed mix, include a cover crop of oats, winter wheat, or rye to stabilize the swale in the short term.
** Road salt tolerance should be considered if facility will receive pavement runoff.
** Road salt tolerance should be considered if facility will receive pavement runoff.