At the heart of all Filterra systems is Filterra engineered media; a
specified gradation of washed aggregate and organic material
homogeneously blended under strict quality controlled conditions. Using
data from studies conducted by the University of Virginia, the filter
media has been optimized to operate under high flow rates (up to 140
inches/hour) while maintaining pollutant removal performance. Filterra
media is tested for hydraulic functionality, fertility, and particle
size distribution to ensure uniform performance.
MEASURED POLLUTANT REMOVAL PERFORMANCE
|
Pollutant
|
Median Removal Efficiency
|
Median Effluent Concentration (mg/L)
|
Third Party Reference Studies
|
Total Suspended Solids
|
86%
|
3.3
|
UVA 2006, Herrera 2009, Herrera 2014, NC State 2015
|
Total Phosphorus (TAPE)
|
70%
|
0.05
|
Herrera 2014, NC State 2015
|
Total Nitrogen
|
34%
|
0.54
|
NC State 2015
|
Total Copper
|
55%
|
0.004
|
UVA 2006, Herrera 2009
|
Dissolved Copper
|
43%
|
0.003
|
Herrera 2009
|
Total Zinc
|
56%
|
0.04
|
UVA 2006, Herrera 2009, NC State 2015
|
Dissolved Zinc
|
54%
|
0.1
|
Herrera 2009
|
Total Petroleum Hydrocarbons
|
87%
|
0.71
|
Herrera 2009
|
Information above is based on results from third party
field studies following industry recognized protocols such as TAPE and
TARP. Relevant studies are noted
for each pollutant, and corresponding data was aggregated to provide
realistic and repeatable performance expectations.
Some jurisdictions recognize higher removal rates - see your Contech Stormwater Consultant for performance expectations.
Select Filterra Approvals
- Washington Department of Ecology (GULD) – Basic, Enhanced,Phosphorus, and oil
- New Jersey Department of Environmental Protection (NJ DEP)
- Maine Department of Environmental Protection
- Maryland Department of the Environment - Environmental Site Design (ESD)
- North Carolina Department of Environmental Quality (NC DEQ)
- Texas Commission on Environmental Quality
- City of Portland, Oregon Bureau of Environmental Services
- Virginia Department of Environmental Quality
Applications
- Low Impact Development, Green Infrastructure, and Environmental Site Design
- High pollutant removal requirements
- New construction and urban retrofits
- Pretreatment for above-ground or shallow below-ground storage
- Shallow, decentralized treatment