Changes

Jump to navigation Jump to search
Line 374: Line 374:  
*Repair sunken areas when ≥ 10 cm deep and barren/eroded areas when ≥ 30 cm long;
 
*Repair sunken areas when ≥ 10 cm deep and barren/eroded areas when ≥ 30 cm long;
 
*Remove sediment when > 5 cm deep or time to drain water ponded on the surface exceeds 48 hours;
 
*Remove sediment when > 5 cm deep or time to drain water ponded on the surface exceeds 48 hours;
*Replace filter media around inlets periodically (e.g., every 5 to 10 years) to maintain treatment performance.
+
*Replace top 5 cm of filter media around inlets periodically (e.g., every 5 to 10 years) to maintain treatment performance.
 
|[[File:Filter bed bio pass.PNG|295px|thumb|center|There are no erosion gullies or bare soil areas on the filter bed surface and mulch cover remains in place.]]  
 
|[[File:Filter bed bio pass.PNG|295px|thumb|center|There are no erosion gullies or bare soil areas on the filter bed surface and mulch cover remains in place.]]  
 
|[[File:Filter bed bio fail.PNG|300px|thumb|center|Erosion gullies and bare soil areas are present on the filter bed surface, indicating that concentrated flow occurs regularly into the BMP feature. (Photo Source: CVC).]]  
 
|[[File:Filter bed bio fail.PNG|300px|thumb|center|Erosion gullies and bare soil areas are present on the filter bed surface, indicating that concentrated flow occurs regularly into the BMP feature. (Photo Source: CVC).]]  

Navigation menu