Summary of Bioretention Variants for Permeability of Native Soils and Potential Land use Pollutant Loading



Bioretention Type Variant Underlying Soil Performance Criteria
Filtration/Partial Recharge Facility No under-drain Higher recharge potential (facility drain time without under-drain is 48 hours)
Infiltration/Recharge Facility Under-drain Lower recharge potential (facility drain time without under-drain is > 48 hours)
Infiltration/Filtration/Recharge Facility Elevated under-drain Higher nutrient loadings and/or quantity control
Filtration Only Facility Under-drain with liner Hot Spot Treatment