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<center><font size=3>'''Recommended maintenance activities for media filters'''.</font size><br> | <center><font size=3>'''Recommended maintenance activities for media filters'''.</font size><br> | ||
Link to this [[Recommended maintenance activities for media filters|table]]</center> | Link to this [[Recommended maintenance activities for media filters|table]]</center> | ||
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<td>As needed</td> | <td>As needed</td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
+ | <td> | ||
*Ensure that contributing area, facility, inlets and outlets are clear of debris. | *Ensure that contributing area, facility, inlets and outlets are clear of debris. | ||
*Ensure that the contributing area is stabilized and mowed, with clippings removed. | *Ensure that the contributing area is stabilized and mowed, with clippings removed. | ||
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*Check to ensure that the filter surface is not clogging (also check after storms greater than about 1”). | *Check to ensure that the filter surface is not clogging (also check after storms greater than about 1”). | ||
*Ensure that activities in the drainage area minimize oil/grease and sediment entry to the system. | *Ensure that activities in the drainage area minimize oil/grease and sediment entry to the system. | ||
− | *If permanent water level is present in pre-treatment chamber (e.g., perimeter sand filter), ensure that the chamber does not leak, and normal pool level is retained. | + | *If permanent water level is present in pre-treatment chamber (e.g., perimeter sand filter), ensure that the chamber does not leak, and normal pool level is retained.</td> |
<td>Monthly</td> | <td>Monthly</td> | ||
</tr> | </tr> |
Recommended Maintenance Activities for Media Filters (Sources: WMI, 1997; Pitt, 1997) | |
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Activity | Schedule |
|
As needed |
|
Monthly |
|
Annually |
*Remove and replace the top 2-5 inches of media every 3 to 5 years for low sediment applications, more often for areas of high sediment yield or high oil and grease | 3 to 5 years |