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{{textbox|Infiltration facilities can be effective on low permeability soils with infiltration rates ≤ 15 mm/hr:
 
{{textbox|Infiltration facilities can be effective on low permeability soils with infiltration rates ≤ 15 mm/hr:
 
*See [[Underdrains| underdrains]] and  
 
*See [[Underdrains| underdrains]] and  
*Results from STEP studies of infiltration practices on [[low permeability soils]]
+
*Results from STEP studies of infiltration facilities located on [[low permeability soils]] in Ontario.
 
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

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