Changes

===Chemical control===

===Chemical control===

For infiltration practices an 'amendment' or chemically reactive 'additive' can help to retain even more phosphorus.

For infiltration practices an 'amendment' or chemically reactive 'additive' can help to retain even more phosphorus. Typically these components would make up 5 to 10% by volume of the filter media mixture.  

{{:Additives}}

{{:Additives}}

==Phosphorus testing in filter media==

==Phosphorus testing in filter media==

To help ensure LID BMPs sustain healthy vegetation cover while not contributing substantially to nutrient loading of receiving waters, the quantity of '''extractable (i.e., available) phosphorus''' in the soil component needs to be measured and compared to design specifications or acceptance criteria.

To help ensure LID BMPs sustain healthy vegetation cover while not contributing substantially to nutrient loading of receiving waters, the quantity of '''extractable (i.e., available) phosphorus''' in the filter media or growing media (i.e., soil) component needs to be measured and compared to design specifications or acceptance criteria.

{{:Phosphorus testing in media}}

{{:Phosphorus testing in media}}