Imbrium - Model Filterra -Bioretention Systems

• Low Impact Development and Green Infrastructure Design
• High pollutant removal requirements
• New construction and urban retrofits
• Pretreatment for above-ground or shallow below-ground storage
• Shallow (1.3 m), decentralized treatment
• LEED points

How Filterra Works

1. Stormwater runoff enters the Filterra system through a curb-inlet opening and flows through a specially designed filter media mixture contained in a landscaped modular container. The filter media captures and immobilizes pollutants; some of these pollutants are then decomposed, volatilized and incorporated into the biomass of the Filterra system’s micro/macro fauna and flora. Stormwater runoff flows through the media and into an underdrain system at the bottom of the container, where the treated water is discharged.
2. The standard configuration utilizes a downstream catchbasin for bypass flows allowing the shallowest profile (typical 1.3 m) and most flexible design.

Filterra Media – Proven Pollutant RemovalAt the heart of the Filterra system is Filterra engineered biofiltration media; a specified gradation of washed aggregate and organic material homogeneously blended under strict quality controlled conditions. Using data from independent, third-party studies including the University of Virginia (TARP), Herrera Environmental Consultants (TAPE), Terraphase Engineering (NJCAT), North Carolina State University (TAPE & TARP) and Geosyntec Consultants, the filter media has been optimized to operate under high flow rates while maintaining pollutant removal performance. Filterra media is tested for hydraulic functionality, fertility, and particle size distribution to ensure uniform performance.

Filterra media also supports a vegetation component with suitable hardiness for the local region consisting of grasses, shrubs, or trees that assist with the adsorption of pollutants with biological uptake/storage and pollutant consumption by microbes within the plant root zone.

VERIFIED PERFORMANCE

Based on more than 20 years of research and development, quality control, testing and field monitoring, Filterra’s water quality treatment performance has been recognized by some of the most significant regulatory agencies, including the states of: Washington, Virginia, Maryland and New Jersey, the District of Columbia, the Texas Commission on Environmental Quality and the Atlanta (GA) Regional Commission. Highlights regarding these approvals include:

• Granted ESD (Environmental Site Design) status by the state of Maryland Department of the Environment (MDE)
• GULD-approved for ALL pollutants of concern with the state of Washington Department of Ecology (WA ECOLOGY) with (2) TAPE field tests
• Third-party nationally recognized field/lab tests completed: (1) TARP, (2) TAPE, (1) NJCAT and (1) NC-DENR

Installation and Maintenance

We make it easy for you...

• Vegetation selection guidance based on your climate zone and salt tolerance.
• On-site planting and activation included with every system.
• The first year of maintenance is included with the purchase of every system.
• Ongoing maintenance is simple:
• - No confined space entry required, everything can be accessed from the surface.
• - Clean biofiltration bay with simple landscape tools (rake and shovel).
• - Replace hardwood mulch.

For the best performance, Imbrium recommends the following:

• Use salt tolerant plants. Refer to Imbrium’s recommended plant list for Filterra systems
• Consider using taller vegetation for increased visibility during large snow events, and suitable system placement to avoid plows and snow piling
• Perform maintenance at the end of winter, and flush the plant with water to washout remaining salt