Bioretention

Investigation of Stormwater Devices using Filter Media

This project began in 2004 and is now complete.  It was funded by the District of Columbia Department of Health, Watershed Protection Division.  

The purpose of this project was to investigate the pollutant removal characteristics of three stormwater filtration devices in the District of Columbia.  A StormFilter, and bioretention facility, and a sand filter have been monitored.  Input and output runoff samples were taken during storm events.  Target pollutants that were monitored included total suspended solids (TSS), oil and grease (O&G), nitrate, ammonia, total Kjeldahl nitrogen (TKN), total phosphorus, and six heavy metals and metalloids, specifically, copper, lead, zinc, cadmium, beryllium, and arsenic. Additionally, media cores were collected from these stormwater management practices and metal accumulation were evaluated using sequential extractions processes.

StormFilter monitoring site

DC Sand Filter

This work was completed by Doctoral student Houng Li.

Bioretention Installations