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→Planning
<h4>Groundwater</h4>
<h4>Groundwater</h4>
<p> The bottom of the infiltration BMP must ≥ 1 m vertically separated from the seasonally high water table, and underlying bedrock. This reduces the risk of contaminating groundwater and helps to ensure reliable infiltration rates throughout the year. </p>
<p> The bottom of the infiltration BMP must ≥ 1 m vertically separated from the seasonally high water table, and underlying bedrock. This reduces the risk of contaminating groundwater and helps to ensure reliable infiltration rates throughout the year. </p>
<div class="column clearfix">
<table class="table table-bordered table-hover" >
<tr class="success">
<th rowspan="2">>Catchment area</th><th colspan="3">Consequence of failure</th>
<tr class="success">
<th>No damage or inconvenience</th><th>Minor damage or inconvenience to external structures (e.g. ponding in parking lot)</th><th>Significant damage to buildings or infrastructure (e.g. flooding damage)</th>
<tr><td> <100 m<sup>2</sup></td><td>1.5</td><td>2</td><td>10</td></tr>
<tr><td> 100 - 1000 m<sup>2</sup><td>1.5</td><td>3</td><td>10</td></tr>
</table>