| First Year of Operation
|
| Activity
| Frequency
| Time Period
| Level of Effort
| O&M Benefit
|
| Check operation of mechanical parts like pumps
| At least twice after the system becomes operational
| During a storm event
| 2-4 hours
| 1
|
| Check condition of first flush and high flow diverters
| At least twice after storm events > 0.5 inches
| Within the first 6 months
| 1-2 hours
| 1
|
| Check for clogging
| At least twice after storm events > 0.5 inches
| Within the first 6 months
| 1-2 hours
| 1
|
| Check for erosion downstream of the high flow diverter
| At least twice after storm events > 0.5 inches
| Within the first 6 months
| 1 hour
| 1
|
| Check for leaks
| At least twice after storm events > 0.5 inches
| Within the first 6 months
| 1 hour
| 1
|
| Check performance of water treatment system and adjust treatment parameters
| After tank has filled up
| Within first month
| 2 hours
| 4
|
| After First Year of Operation
|
| Activity
| Frequency
| Time Period
| Level of Effort per Visit
| O&M Benefit
|
| Inspect and clean pre screening devices and first flush diverters
| Quarterly
| Seasonally
| 2 hours
| 1
|
| Check and clean any filters to prevent clogging
| 3 times per year and/or after each event that exceeds the design capacity of the collection system
| 1-2 hours
| 1
|
| Remove leaves and debris from the gutters and downspouts
| Semi-annually
| Spring and Fall
| 2-4 hours
| 1
|
| Clean out tank to remove sediment and algae
| Semi-annually
| Spring and Fall
| 4 hours
| 1,4
|
| Check and repair damage to collection surface and collection tanks
| Annually
| Spring or Fall
| 2-4 hours
| 1
|
| Check and repair erosion along the diversion pathways
| Annually
| After large storm
| 1-2 hours
| 1
|
| Check and repair any leaks
| Annually
| Spring or Fall
| 2-4 hours
| 1
|
| Inspect and repair mosquito screens
| Annually
| Spring or Fall
| 1-2 hours
| 1
|
| Clear overhanging vegetation and trees over roof
| Annually
| Winter
|
| 1
|
| Winterize or disconnect the storage system before the winter
| Annually
| Late Fall
| Depends on system
| 1
|
| Check structural integrity of tank, pump, pipe, and electrical system and repair any damages as needed
| Every 3 years
| As convenient
| Depends on repairs needed
| 1
|
| After 5+ Years of Operation (non-routine maintenance)
|
| Activity
| Frequency
| Time Period
| Level of Effort per Visit
| O&M Benefit*
|
| After long term operation of the practice, some occasional and infrequent maintenance activities might be required, such as replacement of structural materials, conveyance equipment, or storage tanks.
| As needed
| As needed
| Could be significant depending on the activity
| 1,4
|
Key to Maintenance Benefits:
- Proper stormwater flow and infiltration
- Creation and maintenance of wildlife habitat
- Creation and maintenance of pollinator habitat
- Nutrient cycling and storage
- Aesthetics and public enjoyment
- Carbon sequestration
|
