Changes

|

|

*Include [[Bioretention: Sizing|standpipes]] or access points to provide means of flushing the [[perforated pipe]];

*Include [[Bioretention: Sizing|standpipes]] or access points to provide means of flushing the [[perforated pipe]];

*Keep pipe and flow restrictor free of obstructions by flushing annually;

*Keep pipe and flow restrictor free of obstructions by flushing as needed;

*Inspect flow restrictor frequently (e.g., biannually to quarterly).

*Inspect flow restrictor frequently (e.g., biannually to quarterly).

|[[File:Underdrain bio pass.PNG|310px|thumb|center|The perforated sub-drain pipe is not obstructed by sediment, debris or roots and shows no signs of damage.]]  

|[[File:Underdrain bio pass.PNG|310px|thumb|center|The perforated sub-drain pipe is not obstructed by sediment, debris or roots and shows no signs of damage.]]