Changes

In Ontario the vertical separation between a practice and the water table or bedrock is frequently cited as 1 meter.  

In Ontario the required vertical separation between a practice and the water table or bedrock is frequently cited as 1 meter.  

This comes from the  

This comes from the [https://www.ontario.ca/document/stormwater-management-planning-and-design-manual-0 2003 Stormwater Management Planning and Design Manual].

''"The depth to bedrock should be greater than or equal to 1 metre below the bottom of the [[exfiltration trenches|perforated pipe]] storage media to ensure adequate drainage/hydraulic potential"<ref name=MOE2003>https://www.ontario.ca/document/stormwater-management-planning-and-design-manual/stormwater-management-plan-and-swmp-design</ref>''

''"The depth to bedrock should be greater than or equal to 1 metre below the bottom of the [[exfiltration trenches|perforated pipe]] storage media to ensure adequate drainage/hydraulic potential"<ref name=MOE2003>https://www.ontario.ca/document/stormwater-management-planning-and-design-manual/stormwater-management-plan-and-swmp-design</ref>''

Both of these considerations are equally relevant to the [[underdrain]] of any structural BMP.   

Both of these considerations are equally relevant to the [[underdrain]] of any structural BMP.   

Other relevant  

Other relevant