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− | <td>Key to Maintenance Benefits: | + | <td colspan=5>Key to Maintenance Benefits: |
*Proper stormwater flow and infiltration | *Proper stormwater flow and infiltration | ||
*Creation and maintenance of wildlife habitat | *Creation and maintenance of wildlife habitat |
First Year of Operation | |||||
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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:
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