| Device | Installation notes | Frequency of inspections | Maintenance checklist (link) | Permitted on private land/ Maintenance agreement recommended | Practices for minimizing sediment and trash buildup | Practices for minimizing washout | Cost considerations (equipment needed and man hours) |
|---|---|---|---|---|---|---|---|
| Pretreatment vegetated filter strip (VFS) | Construction sequence | Quarterly and after every 1 in storm event for first two years, then biannually [1] | Sediment removed at least biannually of when buildup exceeds 2 inches in depth | Appropriate vegetation and landscaping maintenance; See Appendix [1] | Generally $100-$1400 per acre | ||
| Level-Spreader - Vegetative Filter Strip System (LS-VFS) | Construction notes | Quarterly and after every 1 in storm event for first two years, then biannually [1] | Sediment removed at least biannually of when buildup exceeds 2 inches in depth [1] | Appropriate vegetation and landscaping maintenance; See Appendix [1] | Generally $100-$1400 per acre [1] | ||
| Up-Flo Filter | Every 6 months for first year of operation, then site specific. Floatables, sediment, media, and drain down filter each need to be inspected [2] | Inspection and maintenance checklist | Sediment removal at least once per year or once sediment depth is 16 inches | Routine maintenance for manhole unit takes about 1 hour | |||
| Storm Clean | One-person installation | Monthly | Maintenance instructions | When visual inspection or water sampling show degradation. MetalZorb is non-hazardous and does not require special waste handling | Vactor truck or large shop vac; One person [3] | ||
| Gravel filtration | After each rainfall | Remove sediment from behind bag as needed | |||||
| Filtration berm | Construction sequence | After each rainfall [4] | Maintenance considerations | Routinely remove accumulated trash and debris [4] | Appropriate vegetation and landscaping maintenance (eg. mowing and level gradient restoration); See Appendix [4] | Depends on height, length, width, and location of berm [4] | |
| SiltSoxx R by Filtrexx | Installation instructions | Within 24 hours after rainfall event [5] | Maintenance instructions | Sediment removal from upslope side when accumulation has reached ½ the effective height of the Soxx [5] | |||
| StormExx | Installation notes | Every 90 days, frequent drive through inspection during leaf-fall and after storm events [6] | Costs for one year of service and maintenance may be added to proposal [6] | Quarterly general service, fall cleaning and cartridge replacement [6] |