Changes

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File:SWTT Low Perm Soil Cells Final.png|thumb|left|450px|'''Tree trench with soil cells on low permeability subsoil''' - This tree trench configuration possess low permeability soil ([[Soil groups]] C or D), along with a clean-out stand pipe for the underdrain, which is placed lower in the feature to allow water to infiltrate into the system and remove contaminants from the road/sidewalk before being taken up by the tree or transported out of the feature and back into the storm sewer system. It also includes soil cells or 'modular soil support systems'. <span style="color:red">'''''Note''': The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span>

File:SWTT Low Perm Soil Cells Final.png|thumb|left|450px|'''Tree trench with soil cells on low permeability subsoil''' - This tree trench configuration features an overflow outlet storm sewer pipe connection in the catch basin and underdrain to allow excess water to leave the practice. The underdrain perforated pipe is embedded in the aggregate base due to the slow drainage rate of the subsoil. Solid standpipes connected to the perforated pipe provide access for inspection and maintenance tasks over the lifespan of the facility. <span style="color:red">'''''Note''': The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span>

rect 951 3681 1591 3739 [[Soil groups|Uncompacted Subgrade Soil]]

rect 951 3681 1591 3739 [[Soil groups|Uncompacted Subgrade Soil]]

rect 1596 3684 1996 3737 [[Soil groups|Compacted Subgrade Soil]]

rect 1596 3684 1996 3737 [[Soil groups|Compacted Subgrade Soil]]