Changes

===Constraints===

===Constraints===

Infiltration practices are not recommended:

Infiltration practices are not recommended:

#Where the bedrock is within 1 m below the bottom of the proposed BMP,

#over swelling clays or unstable sub-soils,

#over contaminated soils or sites with high risk of contamination from onsite activities,  

#Over swelling clays or unstable sub-soils,

#in flood prone areas where the wastewater system is sensitive to groundwater conditions causing sewer backups, and where LID BMPs have been found to be ineffective,

#Over contaminated soils or sites with high risk of contamination from onsite activities,  

#in areas where the ecology and natural hydrology are dependent upon surface water,

#In flood prone areas where the wastewater system is sensitive to groundwater conditions causing sewer backups, and where LID BMPs have been found to be ineffective,

#in areas where increased infiltration will result in elevated groundwater levels, which can be demonstrated to damage critical utilities or private property, or

#In areas where the ecology and natural hydrology are dependent upon surface water,

#where prohibitions and/or restrictions exist per approved Source Protection Plans (see MOECC guidance).

#Where prohibitions and/or restrictions exist per approved Source Protection Plans (see MOECC guidance).

#the seasonal high groundwater level comes within 1 m below the bottom of the proposed BMP.

===Designing within constraints===

===Designing within constraints===

{{TextBox|1= Infiltration can still be optimized over 'tight' soils with infiltration rates ≤ 15 mm/hr:

{{TextBox|1= Infiltration can still be optimized over 'tight' soils with infiltration rates ≤ 15 mm/hr: