Difference between revisions of "Determination of Appropriate Monitoring Level(s) for a Stormwater Treatment Practice"
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<font size=3>'''Determination of Appropriate Monitoring Level(s) for a Stormwater Treatment Practice'''.</font size><br> | <font size=3>'''Determination of Appropriate Monitoring Level(s) for a Stormwater Treatment Practice'''.</font size><br> | ||
Link to this [[Determination of Appropriate Monitoring Level(s) for a Stormwater Treatment Practice|table]] | Link to this [[Determination of Appropriate Monitoring Level(s) for a Stormwater Treatment Practice|table]] | ||
| − | <table class="sortable" | + | <table class="sortable"> |
| − | |||
| − | |||
| − | |||
<tr> | <tr> | ||
<th>Level</th> | <th>Level</th> | ||
| − | <th> | + | <th>When should I perform this assessment?</th> |
<th>Advantages</th> | <th>Advantages</th> | ||
<th>Requirements/limitations</th> | <th>Requirements/limitations</th> | ||
<th>Recommended frequency</th> | <th>Recommended frequency</th> | ||
| − | <th>Can this be used to | + | <th>Can this be used to obtain a [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_pollutant_removal,_stormwater_credits stormwater credit]?</th> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>Visual inspection</td> | + | <td>[https://stormwaterbook.safl.umn.edu/assessment-programs/visual-inspection Visual inspection]</td> |
<td>Recommended for all practices</td> | <td>Recommended for all practices</td> | ||
<td>Quick and cost-effective</td> | <td>Quick and cost-effective</td> | ||
| Line 22: | Line 19: | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>Capacity testing</td> | + | <td>[https://stormwaterbook.safl.umn.edu/assessment-programs/capacity-testing Capacity testing]</td> |
<td>If there are suspected filtration rate problems with the practice, or to determine if the media has capacity for phosphorus removal </td> | <td>If there are suspected filtration rate problems with the practice, or to determine if the media has capacity for phosphorus removal </td> | ||
<td>Applicable for practices of all sizes, quickly identify specific areas that require maintenance, less time and expense than monitoring</td> | <td>Applicable for practices of all sizes, quickly identify specific areas that require maintenance, less time and expense than monitoring</td> | ||
| − | <td>A Modified Philip-Dunne Infiltrometer is recommended for filtration rate testing. </td> | + | <td>A [https://stormwaterbook.safl.umn.edu/water-budget-measurement/infiltration Modified Philip-Dunne Infiltrometer] is recommended for filtration rate testing. </td> |
<td>Every few years</td> | <td>Every few years</td> | ||
| − | <td>Consult with MPCA or regulatory agency to determine eligibility</td> | + | <td>Consult with MPCA (Minnesota Pollution Control Agency) or regulatory agency to determine eligibility</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>Synthetic runoff testing</td> | + | <td>[https://stormwaterbook.safl.umn.edu/assessment-programs/synthetic-runoff-testing Synthetic runoff testing]</td> |
| − | <td>If there are suspected problems with filtration or pollutant removal, or to establish a baseline performance level</td> | + | <td>If there are suspected problems with filtration or pollutant removal, or to establish a <span title="The condition(s) existing at a defined point in time or the condition corresponding to a specified performance goal or target. Examples include but are not limited to initial conditions, expected performance (e.g. expected pollutant removal), or a point in time. Baseline condition provides a reference for comparison"> '''baseline condition'''</span> or baseline performance level</td> |
| − | <td>Controlled method to accurately measure drain time and/or pollutant removal efficiency</td> | + | <td>Controlled method to accurately measure <span title="The length of time, usually expressed in hours, for ponded water in a stormwater practice to drain. For stormwater practices where water is stored in media, there is no clear definition of drawdown, but an acceptable assumption is the time for water to drain to field capacity"> '''drawdown time'''</span> and/or pollutant removal efficiency</td> |
| − | <td>Testing will be limited by available water supply. | + | <td> |
| − | Must be able to plug or measure all outflow paths other than filtration. | + | *Testing will be limited by available water supply. |
| − | Must be able to continuously measure water surface elevation in practice during test. | + | *Must be able to plug or measure all outflow paths other than filtration. |
| − | Recommended for small stormwater treatment practices. May require authorization to conduct testing with targeted pollutants.</td> | + | *Must be able to continuously measure water surface elevation in practice during test. |
| + | *Recommended for small stormwater treatment practices. May require authorization to conduct testing with targeted pollutants.</td> | ||
<td>Every few years</td> | <td>Every few years</td> | ||
<td>Consult with MPCA or regulatory agency to determine eligibility</td> | <td>Consult with MPCA or regulatory agency to determine eligibility</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>Monitoring</td> | + | <td>[https://stormwaterbook.safl.umn.edu/assessment-programs/monitoring Monitoring]</td> |
<td>Goals include obtaining stormwater credits, assessing performance results and life of filter media, or complying with a permit or regulatory agency </td> | <td>Goals include obtaining stormwater credits, assessing performance results and life of filter media, or complying with a permit or regulatory agency </td> | ||
<td>Most comprehensive assessment technique and measures the response to natural rainfall events</td> | <td>Most comprehensive assessment technique and measures the response to natural rainfall events</td> | ||
| − | <td>Requires the most time, labor, and equipment of the four assessment techniques. | + | <td> |
| − | Variations in weather, pollutant loading, and flows require correct and simultaneous operation of all instrumentation.</td> | + | *Requires the most time, labor, and equipment of the four assessment techniques. |
| + | *Variations in weather, pollutant loading, and flows require correct and simultaneous operation of all instrumentation.</td> | ||
<td>Continuously from construction of the IESF</td> | <td>Continuously from construction of the IESF</td> | ||
<td>Yes</td> | <td>Yes</td> | ||
</tr> | </tr> | ||
</table> | </table> | ||
| + | |||
| + | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Monitoring and assessment]] | ||
Latest revision as of 01:00, 23 December 2022
Determination of Appropriate Monitoring Level(s) for a Stormwater Treatment Practice.
Link to this table
| Level | When should I perform this assessment? | Advantages | Requirements/limitations | Recommended frequency | Can this be used to obtain a stormwater credit? |
|---|---|---|---|---|---|
| Visual inspection | Recommended for all practices | Quick and cost-effective | Available personnel. Does not necessarily identify causes of poor performance. | ≥ 1x / year, at start of rainy season | No |
| Capacity testing | If there are suspected filtration rate problems with the practice, or to determine if the media has capacity for phosphorus removal | Applicable for practices of all sizes, quickly identify specific areas that require maintenance, less time and expense than monitoring | A Modified Philip-Dunne Infiltrometer is recommended for filtration rate testing. | Every few years | Consult with MPCA (Minnesota Pollution Control Agency) or regulatory agency to determine eligibility |
| Synthetic runoff testing | If there are suspected problems with filtration or pollutant removal, or to establish a baseline condition or baseline performance level | Controlled method to accurately measure drawdown time and/or pollutant removal efficiency |
|
Every few years | Consult with MPCA or regulatory agency to determine eligibility |
| Monitoring | Goals include obtaining stormwater credits, assessing performance results and life of filter media, or complying with a permit or regulatory agency | Most comprehensive assessment technique and measures the response to natural rainfall events |
|
Continuously from construction of the IESF | Yes |
This page was last edited on 23 December 2022, at 01:00.