Changes

*Check for damage or vegetation;

*Check for damage or vegetation;

*Remove any vegetation or natural debris annually to biannually.

*Remove any vegetation or natural debris annually to biannually.

|[[File:Pass perimeter green roof.PNG|300px|thumb|center|CDA has not changed in size or land cover. Sediment, trash or debris is not accumulating and point sources of contaminants are not visible.]]  

|[[File:Pass perimeter green roof.PNG|300px|thumb|center|The footprint area of the green roof matches what was specified in the final design.]]  

|[[File:Fail perimeter green roof.PNG|280px|thumb|center|Size of the CDA has changed from design assumptions (i.e. large asphalt area drains to a small portion of the permeable pavement). Evidence of surface ponding is visible.]]  

|[[File:Fail perimeter green roof.PNG|300px|thumb|center|The footprint area of the green roof is significantly smaller than what was specified in the final design.]]  

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|'''[[Green roof media|Growing medium/filter bed]]'''

|'''[[Green roof media|Growing medium/filter bed]]'''

*Replace erosion/scour protection where missing or uplifted;

*Replace erosion/scour protection where missing or uplifted;

*Remove trash and natural debris annually to biannually.

*Remove trash and natural debris annually to biannually.

|[[File:Pass Filter Bed green roof.PNG|280px|thumb|center|Although permeable pavers are generally considered [[pretreatment]] for other BMPs in a [[Low impact development treatment train tool|treatment train]] system, using eavestrough screens can act as pretreatment as they don't add to sediment build up and accumulation on the paver surface. (Photo Source: Guertin, 2010)<ref>Guertin, M. 2010. Simple Screen Gutter Guards Better Than Pro-Installed Systems (and way cheaper). Fine Homebuilding - The Daily Fix. Accessed July 17 2022. https://www.finehomebuilding.com/2010/08/17/simple-screen-gutter-guards-better-than-pro-installed-systems-and-way-cheaper</ref>]]  

|[[File:Pass Filter Bed green roof.PNG|340px|thumb|center|There is no standing water on the green roof surface shortly after a storm event.]]  

|[[File:Fail Filter Bed green roof.PNG|300px|thumb|center|Build up of leads, sediment and leaf detritus in an eavestrough downspout disconnection leading to a permeable pavement surface. If not cleaned regularly this can lead to clogged pores between the pavers reducing the infiltration rate where the downspout deposits water onto the feature. (Photo Source: My Gutter Pro, 2021)<ref>My Gutter Pro. 2021. Clogged Downspout : Causes and Solutions. 10 April 2021. Accessed July 19 2022. https://mygutterpro.com/downspout-clog/</ref>]]  

|[[File:Fail Filter Bed green roof.PNG|300px|thumb|center|Standing water is present on the green roof surface and in the [[underdrain]]/sub-drain system and bare soil areas are visible (Photo Source: J.V. Heidler)]]  

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|'''[[Vegetation]]'''

|'''[[Vegetation]]'''

*Remove undesirable [[vegetation]] biannually to quarterly;

*Remove undesirable [[vegetation]] biannually to quarterly;

*Prune [[shrubs]] and [[trees]] annually, and replace dead [[plants]] to maintain a minimum of 80% cover by the third growing season.   

*Prune [[shrubs]] and [[trees]] annually, and replace dead [[plants]] to maintain a minimum of 80% cover by the third growing season.   

|[[File:Pass Veg green roof.PNG|315px|thumb|center|The vegetation cover on the permeable pavement is turf grass as specified in the final design and contains very few weeds. (Photo source: WEF).]]  

|[[File:Pass Veg green roof.PNG|315px|thumb|center|The green roof vegetation looks healthy and well maintained.]]  

|[[File:Fail Veg green roof.PNG|290px|thumb|center|The turf grass cover on the permeable walkway is not thriving in some areas and needs cutting in others. It is also impairing the aesthetic value of the BMP.]]  

|[[File:Fail Veg green roof.PNG|315px|thumb|center|A portion of the vegetation on the green roof is dying or not thriving.]]  

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|'''[[Overflow|Overflow Outlet]]'''

|'''[[Overflow|Overflow Outlet]]'''

*Remove trash, natural debris and clippings biannually to quarterly;

*Remove trash, natural debris and clippings biannually to quarterly;

*Flush with hose or pressure washer annually to biannually

*Flush with hose or pressure washer annually to biannually

|[[File:Pass overflow green roof.PNG|320px|thumb|center|The overflow outlet is free of damage and obstruction and functions as designed to safely convey excess water from the BMP.]]  

|[[File:Pass overflow green roof.PNG|320px|thumb|center|The overflow outlets of this green roof are free of damage and obstruction and function as designed to safely convey excess water from the BMP (Photo Source: Vegetal I.D.).]]  

|[[File:Fail overflow green roof.PNG|280px|thumb|center|The overflow outlet is obstructed with sediment which impairs its function to convey excess water from the BMP.]]  

|[[File:Fail overflow green roof.PNG|320px|thumb|center|Sediment is accumulating at the overflow outlet which could impair its drainage function and cause surface ponding and vegetation die-off (Photo Source: Jorg Breuning).]]  

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|'''[[Green roofs#Irrigation|Irrigation System]]'''

|'''[[Green roofs#Irrigation|Irrigation System]]'''

*In the late fall/early winter, disconnect the system from the water supply, connect it to an air compressor and blow air through it to remove water and ensure the lines and parts are dry, shut off water supply to the roof, and drain all hose bibs;

*In the late fall/early winter, disconnect the system from the water supply, connect it to an air compressor and blow air through it to remove water and ensure the lines and parts are dry, shut off water supply to the roof, and drain all hose bibs;

*Remove any debris/sediment accumulated on filters biannually.

*Remove any debris/sediment accumulated on filters biannually.

|[[File:Pass irrigation system green roof.PNG|310px|thumb|center|The solid section of the sub-drain pipe is not obstructed by sediment, debris or roots and shows no signs of damage.]]  

|[[File:Pass irrigation system green roof.PNG|310px|thumb|center|The green roof is well covered by dense, attractive vegetation which helps maintain its stormwater treatment function and aesthetic value (Photo Source: Earth Rangers Centre)<ref>Earth Rangers. n.d. What is the Green Roof? Accessed 08 August 2022. http://www.ercshowcase.com/building-envelope/green-roof/</ref>]]  

|[[File:Fail irrigation system green roof.PNG|300px|thumb|center|A section of the sub-drain pipe has been crushed which substantially reduces its conveyance capacity]]  

|[[File:Fail irrigation system green roof.PNG|340px|thumb|center|A major portion of the green roof contains no living vegetation cover (Photo Source: Kevin Songer).]]  

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|'''[[Green roofs#Design|Protective layers]]'''

|'''[[Green roofs#Design|Protective layers]]'''

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*Repair isolated leaks in the water-proofing membrane through deconstruction of a small portion of the green roof, patching with new material, and reconstruction.

*Repair isolated leaks in the water-proofing membrane through deconstruction of a small portion of the green roof, patching with new material, and reconstruction.

|[[File:Pass protective layers green roof.PNG|340px|thumb|center|The well is undamaged and accessible and the cap is in place and secured to prevent unauthorized access]]  

|[[File:Pass protective layers green roof.PNG|340px|thumb|center|There are no signs of damage to the concrete parapets along the perimeter and no uplift of green roof layers.]]  

|[[File:Fail protective layers green roof.PNG|300px|thumb|center|The well cap is missing and the casing is clogged by sediment, preventing access for monitoring and allowing sediment to flow into the sub-drain system.]]  

|[[File:Fail protective layers green roof.PNG|340px|thumb|center| One of the green roof growing media structures has been displaced and requires replacement and repair. (Photo Source: Kevin Songer]]  

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