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]
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 [5] Yes See Layout
Eliminator Same as catch basin Up to 2 cfs if Elimo-Filter used [6] 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 [7] Blocks of expanded polystyrene, PVC Calm to medium current water bodies downstream of nearshore construction zones, dredging, demolition [8] 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
Link to this table

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 [9] Maintenance considerations 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) [10]
Eliminator Installs in minutes. Installation instructions here. [11] After major storm events Catch basin, hood, and filter (if used) cleaned annually [12]
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.

This page was last edited on 13 April 2020, at 18:00.

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