Economical design with precast concrete frame and galvanized steel vertical supports provide system strength. Curb inlet is designed for H20 loading. Concrete frame system is lighter than concrete box systems and easier to install.

Pretreatment sediment collection sump collects trash, sand, and sediment prior to entering the filtration system. Removable cover allows for easy maintenance from the curbside with DPW vactor equipment
Corrugated HDPE chamber lining allows for a variety of configurations and custom designs to achieve quantity control while also allowing direct infiltration.

Custom design includes a wide choice of surface options, such as permeable pavers, brick, granite, or steel or aluminum grating.

Concrete frame has 2 open sides to allow for unrestricted tree root migration. A wide variety of trees are able to grow to maturity in the GSS open system design. Healthy trees contribute to green space and sustainable site design.

Low Impact Development design with open bottom allows for direct infiltration of treated stormwater If infiltration is not possible, treated stormwater can be collected in underground storage chambers or directed into traditional stormwater catch basins.
Expected Pollutant Removal Rates for Bioretention and Tree Filter Systems*

Total Suspended Solids >83%
Total Nitrogen >50%
Total Phosphorous >60%
Total Select Metals 35% to 95%
Total Zinc >85%
Oil and Grease >80%
Bacteria >85%
* Based upon published 3rd party testing by University of New Hampshire Stormwater Center; University of Massachusetts Stormwater Technologies Clearinghouse; University of Virginia Stormwater Center.
Eligible for LEED for New Construction points in the Sustainable Sites subcategories for Stormwater Management: Quantity Control (6.1) and Stormwater Management: Quality Control (6.2), and for Materials and Resource Selection subcategories for Recycled Materials (4.0) and Regional Materials (5.0).


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