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|Documented total phosphorus removal of up to 71%<ref>Hood A, Chopra M, Wanielista M. Assessment of Biosorption Activated Media Under Roadside Swales for the Removal of Phosphorus from Stormwater. Water. 2013;5(1):53-66. doi:10.3390/w5010053.</ref>||[http://boldandgold.com/index.html Proprietary]

|Documented total phosphorus removal of up to 71%<ref>Hood A, Chopra M, Wanielista M. Assessment of Biosorption Activated Media Under Roadside Swales for the Removal of Phosphorus from Stormwater. Water. 2013;5(1):53-66. doi:10.3390/w5010053.</ref>||[http://boldandgold.com/index.html Proprietary]

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![[Fly ash]]<ref>Brown, G., Vogel, J., and Storm, D. (2016). “Using Fly Ash in Bioretention Cells to Remove Phosphorus from Stormwater.” <http://rgvstormwater.org/wp-content/uploads/2016/09/Fly-Ash-Brown.pdf>.</ref>

![[Fly ash]]

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