The National Academies

NCHRP 25-54 [Final]

Field Testing of BMPs Using Granulated Ferric Oxide Media to Remove Dissolved Metals in Roadway Stormwater Runoff

  Project Data
Funds: $400,000
Research Agency: Barr Engineering
Principal Investigator: Dr. Keith Pilgrim
Effective Date: 9/16/2016
Completion Date: 6/28/2019

STATUS: Research is complete. Final report and presentation slides summarizing the project are available HERE
The Quality Assurance Project and Sampling and Analysis Plan (QAPP), which details the sampling and analysis protocol, is available HERE.


Dissolved metals in roadway stormwater runoff can exceed water quality standards and state DOTs in many parts of the country are being required to reduce the concentrations of these pollutants. A number of prior studies have evaluated a variety of media for removing dissolved metals from roadway stormwater runoff, concluding that ferric oxide media performed well under controlled conditions. However, field studies were needed to better understand the performance and potential benefits of ferric oxide media in full-scale stormwater best management practices (BMPs) systems.  The report will be of interest to stormwater practitioners seeking information on approaches to addressing dissolved metals as part of a state department of transportation’s (DOT’s) stormwater management program.

The objective of this research was to evaluate the performance and life cycle costs of ferric oxide filter media at two field sites. In addition, a laboratory study was conducted to evaluate the metals removal capacity of an open-graded friction course with ferric oxide media incorporated into the pavement material. 

To create a link to this page, use this URL: http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=4068