The Kennedy/Jenks project that used biochar as part of a stormwater filter in a busy log yard for the Port of Tacoma was a winner of the American Association of Port Authorities 2014 Environmental Improvement Award.
http://www.aapa-ports.org/Programs/content.cfm?ItemNumber=19926&RDtoken=...

In this project they are using a chain of filters working together, that includes sand filteration, a sand and biochar combination and finish with biofilters for phytoremediation. They've had some impressive results: 92% reduction in Zinc, 81% reduction in copper, 94% reduced turbidity, and 85% reduced suspended solids. Biochar is a small part of the total project, but it shows the potential for using biochar as component in filteration media that can improve the system as a whole.

There is additional information about the project on the Kennedy/Jenks Consultants web site
http://www.kennedyjenks.com/2014/11/12/stormwater-projects-make-local-an...

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