m |
m |
||
Line 40: | Line 40: | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td>*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 </td> | + | <td> |
+ | *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 </td> | ||
<td>3 to 5 years</td> | <td>3 to 5 years</td> | ||
</tr> | </tr> | ||
</table> | </table> |
Recommended Maintenance Activities for Media Filters (Sources: WMI, 1997; Pitt, 1997) | |
---|---|
Activity | Schedule |
|
As needed |
|
Monthly |
|
Annually |
|
3 to 5 years |