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→Planning
<p>[[Infiltration: Testing|Infiltration tests]] must be undertaken at the location, depth and with a head of water that replicates the proposed design. </p>
<p>[[Infiltration: Testing|Infiltration tests]] must be undertaken at the location, depth and with a head of water that replicates the proposed design. </p>
<table>
<table>
<table class = "table-responsive table table-striped">
<table class="table-responsive table table-striped">
<caption><strong>Suggested safety factors to be applied to measured percolation rate when designing infiltration facilities</strong></caption>
<caption><strong>Suggested safety factors to be applied to measured percolation rate when designing infiltration facilities</strong></caption>
<tr class="success">
<tr class="success">
<th rowspan="2">Catchment area</th><th colspan="3" class="text-center">Consequence of failure</th>
<th rowspan="2" class="text-center">Catchment area</th>
<tr class="success">
<th colspan="3" class="text-center">Consequence of failure</th>
<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>
<tr class="success">
<tr><td> <100 m<sup>2</sup></td><td>1.5</td><td>2</td><td>10</td></tr>
<th class="text-center">No damage or inconvenience</th>
<tr><td style="white-space: nowrap"> 100 - 1000 m<sup>2</sup><td>1.5</td><td>3</td><td>10</td></tr>
<th class="text-center">Minor damage or inconvenience to external structures (e.g. ponding in parking lot)</th>
</table>
<th class="text-center">Significant damage to buildings or infrastructure (e.g. flooding damage)</th>
</tr>
<tr>
<td class="text-center"><100 m<sup>2</sup></td>
<td class="text-center">1.5</td>
<td class="text-center">2</td>
<td class="text-center">10</td>
</tr>
<tr>
<td style="white-space: nowrap" class="text-center"> 100 - 1000 m<sup>2</sup>
<td class="text-center">1.5</td>
<td class="text-center">3</td>
<td class="text-center">10</td>
</tr>
</table>
<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>