Other water quality devices tables combined

Other water quality devices - pollutant removal information

Other water quality devices - pollutant removal information
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Device	Primary mechanism	Secondary mechanism	Other mechanism	Proprietray/nonproprietray	Above ground/below grade	Pollutants removed
SNOUT	Screening/Straining	Buoyancy/Skimming		Proprietary	Underground	Floatables, trash, oil [1]
Prinsco Preserver Skimmer	Skimming	na	na	Proprietary	Below ground	Floatables, trash, oil
Eliminator	Screening/Straining	Buoyancy/Skimming	Filtration	Proprietary	Underground	Floatables, trash, oil [2]
Floatable boom	Buoyancy/Skimming			Proprietary/Nonproprietary	Water surface	Oil, trash and debris, turbidity [3]
Hood	Buoyancy/Skimming			Nonproprietary	Underground	Floatables, trash, oil

Other water quality devices - system design information

Other water quality devices - system design information
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Device	Drainage area	Entrance/exit velocity	Dimensions	Materials	Layout Recommendations (physical location, off-line placement)	Enhancement opportunity	Sizing calculations
SNOUT	Same as catch basin	Same as catch basin	Variety of sizes and shapes fit most rectangular and round manholes [4]		Existing manholes and sumped catch basins (sump depth must be >36 inches or 2.5 x outlet pipe diameter	Yes	See Layout
Prinsco Preserver Skimmer	Same as catch basin	Same as catch basin	Several size options, all adjustable to fit rectangular and round structures. Minimum 4' structure dia.	Stainless steel & HDPE	Existing & new manholes and sumped catch basins. Sump depth must be 1.5x outlet pipe diameter or greater.	Yes. All parts retrofittable through a 24" opening.	Part size determined via associated pipe diameter. See standard detail.
Eliminator	Same as catch basin	Up to 2 cfs if Elimo-Filter used [5]	8, 10, 12, 15, and 18-inch sizes	High Density Polyethylene	Existing manholes and sumped catch basins	Yes	Generally larger than pipe diameter
Floatable boom			Float height = 2-8 inches, Skirt/curtain = 8-16 ft, Section length 25-100 ft	Blocks of expanded polystyrene, PVC	Calm to medium current water bodies downstream of nearshore construction zones, dredging, demolition	NO	NA
Hood	Same as catch basin						Generally larger than pipe diameter

Other water quality devices - installation and maintenance recommendations

Other water quality devices - installation and maintenance recommendations
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Device	Installation notes	Frequency of inspections	Maintenance checklist (link)	Permitted on private land/ Maintenance agreement recommended	Practices for minimizing sediment and trash buildup	Cost considerations (equipment needed and man hours)
SNOUT		Monthly for the first year, then annual inspection of anti-siphon vent and access hatch. If Bio-Skirt is used, check monthly [6]			Sediment removed from sump when it is half full. Trash and floatables removed when 6 in accumulates on surface. If Bio-Skirt is used, replace immediately after oil spill or when 2/3 of boom is submerged (nearly saturated)
Prinsco Preserver Skimmer	45 minute installation	Spring and fall inspections recommended. More frequent inspections are recommended following installation until a routine maintenance frequency is be determined.	[7]	Yes	Sediment removed when average depth reachs 1x pipe dia. below the outlet. Trash removed annually, or when trash covers water surface to a depth of 0.5x outlet pipe diameter.	Vacuum truck
Eliminator	Installs in minutes. Installation instructions here. [8]	After major storm events			Catch basin, hood, and filter (if used) cleaned annually [9]
Floatable boom		Monthly and after major storm events			Frequent inspection and floatables removal.
Hood		Monthly and after major storm events			Frequent inspection and floatables removal.