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Line 25: ===Designing with constraints==={{textbox|Infiltration can still be optimized over 'tight' soils with infiltration rates ≤ 15 mm/hr:*See [[Underdrains| underdrains]] for [[Bioretention| bioretention]] and [[Trees| tree pits, trenches and soil cells]], and *Results from STEP studies of infiltration practices on [[low permeability soils]]}}{{textbox|Where infiltration is impossible, LID design alternatives exist which can still capture and retain stormwater:*[[Stormwater planters]]*[[Rainwater harvesting]]*[[Green roofs]]*[[Blue roofs]]
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#where prohibitions and/or restrictions exist per approved Drinking Water Source Protection Plans (e.g. should not be used to treat pavement runoff within 2 year time of travel wellhead protection areas; see MOECC guidance).
#where prohibitions and/or restrictions exist per approved Drinking Water Source Protection Plans (e.g. should not be used to treat pavement runoff within 2 year time of travel wellhead protection areas; see MOECC guidance).
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===Designing within constraints===
{{textbox|Infiltration can still be optimized over 'tight' soils with infiltration rates ≤ 15 mm/hr:
*See [[Underdrains| underdrains]] for [[Bioretention| bioretention]] and [[Trees| tree pits, trenches and soil cells]], and
*Results from STEP studies of infiltration practices on [[low permeability soils]]
Infiltration facilities should be designed with modifications where:
Infiltration facilities should be designed with modifications where:
#the underlying bedrock is within 1 m below the bottom of the proposed BMP, or
#the underlying bedrock is within 1 m below the bottom of the proposed BMP, or
#the seasonal high groundwater level (i.e. water table) comes within 1 m below the bottom of the proposed BMP.
#the seasonal high groundwater level (i.e. water table) comes within 1 m below the bottom of the proposed BMP.
}}
}}
{{:Groundwater}}
==Planning==
==Planning==