Stormwater Harvesting and Use Component Checklist and Cost Units

**Stormwater Harvesting and Use Component Checklist and Cost Units**
Phase	Component	Unit
Collection	Cleaning of roof (if retrofit project)	Square foot
	Roof washing system	Each
	Gutters	Linear foot
	Gutter screens	Linear foot
	Downspouts	Linear foot
	Scuppers	Each
	Catch basins	Each
	Catch basin filters	Each
	Manholes	Each
	Oil/water separators	Each
	Storm sewers	Linear foot
	Bypass valves	Each
	First flush diverter	Each
Storage – Ponds/ basins	Site demolition	Varies
	Excavation	Cubic foot
	Disposal of excess soil	Cubic foot
	Vegetation restoration	Square foot
	Baffles at outlet	Linear foot
	Filters at outlet	Each
	Outlet structure	Each
	Pumping system including pump, motor, valves, and pressure tank (for non-gravity and pressurized systems)	Varies
	Aeration	Varies
	Electrical supply (for pumps or aeration)	Varies
Below-ground storage	Site demolition	Varies
	Excavation and backfill	Cubic foot
	Imported aggregate bedding material	Cubic foot
	Disposal of excess soil	Cubic foot
	Vegetation or pavement restoration	Square foot
	Prefabricated tanks	Each
	Baffles, calming inlet, and/or filters, if not supplied with prefabricated tank	Each
	Cast-in-place concrete tank	Varies
	Pumping system including pump, motor, valves, and pressure tank (for non-gravity and pressurized systems)	Varies
	Maintenance access manhole	Each
	Electrical supply (for pumps)	Varies
Treatment systems	Piping	Linear foot
	Valves	Each
	Flow meter (when needed to regulate chemical feed)	Each
	Electrical supply	Varies
	Maintenance access manhole (if located underground)	Each
	Backflow prevention valves (if connected to potable water for supplemental supply and/or for filter backwash)	Each
	Suspended & Colloidal Solids Removal Systems Chemical feed Tank with baffles or mixing device (if chemicals not fed into inline mixing device) Settling basin with dewatering valves for solids removal	Varies
	Residual Suspended Solids Removal Systems Filter chamber containing activated carbon or other filter media, including piping and valves for bypass and backwash (for filtration systems) Tank with micro-bubble diffusion, dewatering valves, and surface skimmer (for dissolved air flotation systems)	Varies
	Residual Colloidal Solids Removal Systems Filter chamber containing multi-media, including piping and valves for bypass and backwash (for ultrafiltration systems)	Varies
	Dissolved Solids Removal Systems pH feed (for reverse osmosis systems) Chemical feed (for electrodialysis systems) Filter chamber containing semi-permeable membrane, including piping and valves for bypass and backwash (for all systems) Solids disposal system	Varies
	Disinfection Chemical feed (for continuous chlorine disinfection) Tank with baffles or mixing device (for batch disinfection with chlorine) Contact tank with UV lights and piping (for ultraviolet disinfection) Tank with piping, valves, ozone diffuser (for ozone disinfection) Off-gas ozone destructor tank (for ozone disinfection)	Varies
Distribution	Pumping system including pump, motor, valves and pressure tank	Varies
	Piping for distribution	Linear foot
	Valves for pressure control, and regulating flow	Each
	Valve boxes	Each
	Sprinkler nozzles – impulse, spray, rotating, bubbler, or drip	Each
	Irrigation controllers with wiring to each sprinkler (for automated control systems)	Varies
	Drain plug (for winterization)	Each