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Line 5: − + − <h4>sand</h4>+ − <h4>Topsoil</h4>+ − <h4>Organic soil amendments</h4>+ − ---- − + − + − + − + − + + + + +
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<li>70-80 % coarse sand</li>
<li>70-80 % coarse sand</li>
<li>10-15 % top soil</li>
<li>10-15 % top soil</li>
<li>10-15 % organic soil amendment</li>
<li>10-15 % organic soil component</li>
</ul>
</ul>
===Sand===
{{:Sand}}
{{:Sand}}
===Topsoil===
{{:Topsoil}}
{{:Topsoil}}
===Organic soil amendments===
<strong>Compost</strong>
<strong>Compost</strong>
<p>Compost is the most widely used organic component. It's use in bioretention facilities is well established and documented. Low-phosphorus composts should always be sought for use in low impact development facilities including bioretention. These are typically created from feedstocks including yard, leaf, and wood waste, and must exclude manures, biosolids, and food scraps.<ref> Hurley S, Shrestha P, Cording A. Nutrient Leaching from Compost: Implications for Bioretention and Other Green Stormwater Infrastructure. J Sustain Water Built Environ. 2017;3(3):4017006. doi:10.1061/JSWBAY.0000821.</ref></p>
<p>Compost is the most widely used organic component. It's use in bioretention facilities is well established and documented. Low-phosphorus composts should always be sought for use in low impact development facilities including bioretention. These are typically created from feedstocks including yard, leaf, and wood waste, and must exclude manures, biosolids, and food scraps.<ref> Hurley S, Shrestha P, Cording A. Nutrient Leaching from Compost: Implications for Bioretention and Other Green Stormwater Infrastructure. J Sustain Water Built Environ. 2017;3(3):4017006. doi:10.1061/JSWBAY.0000821.</ref></p>
<strong>[[Compost|Compost Specifications]]</strong>
<strong>[[Compost|Compost Specifications]]</strong>
<p>Even low-phosphorous composts are known to export phosphorous over many years. The use of compost is not recommended in watersheds for which phosphorous pollution is a concern. There are three alternatives which have undergone field study, each of which has a number of benefits and potential concerns:
<p>Even low-phosphorous composts are known to export phosphorous over many years. The use of compost is not recommended in watersheds for which phosphorous pollution is a concern. There are three alternatives which have undergone field study, each of which has a number of benefits and potential concerns:
<ol>
<li>Coconut coir</li>
<table class = "table table-striped table-responsive">
<li>Sphagnum peat</li>
<caption><strong>Organic soil components</strong></caption>
<li>Wood derviates</li>
<tr class ='success'><th>Material</th><th>Benefits</th><th>Concerns</th></tr>
</ol>
<tr><td>Coconut coir</td><td>Doesn't leach P</td><td>Requires importation</td></tr>
<tr><td>Sphagnum peat moss</td><td>Doesn't leach P</td><td>May not be a sustainble building material</td></tr>
<tr><td>Doesn't leach P <br>Promotes nitrogen removal from water</td><td>TBD</td></tr>
</table>
<strong>Coconut coir</strong>
<strong>Coconut coir</strong>
http://www.modularwetlands.com/new/wp-content/uploads/2015/11/2-Bioretention-Synthesis-2015-DAhearn.pdf
http://www.modularwetlands.com/new/wp-content/uploads/2015/11/2-Bioretention-Synthesis-2015-DAhearn.pdf