Changes

# After final grading, prior to surface course installation to ensure depths, slopes and elevations are acceptable

# After final grading, prior to surface course installation to ensure depths, slopes and elevations are acceptable

# Prior to hand-off points in the construction sequence when the contractor responsible for the work changes (i.e., hand-offs between the storm sewer servicing, paving, building and landscaping contractors)

# Prior to hand-off points in the construction sequence when the contractor responsible for the work changes (i.e., hand-offs between the storm sewer servicing, paving, building and landscaping contractors)

# After every large storm event (e.g., 15 mm rainfall depth or greater) to ensure ESCs and pretreatment or flow diversion devices are functioning and adequately maintained.  View the table below, which describes critical points during the construction sequence when inspections should be performed prior to proceeding further. You can also download and print the table [https://wikidev.sustainabletechnologies.ca/images/9/9f/LID-IM-Guide-7.4-Permeable-Pavements.pdf '''here''']<br>

# After every large storm event (e.g., 15 mm rainfall depth or greater) to ensure ESCs and pretreatment or flow diversion devices are functioning and adequately maintained.  View the table below, which describes critical points during the construction sequence when inspections should be performed prior to proceeding further. You can also download and print the table [https://wikidev.sustainabletechnologies.ca/images/a/a6/LID-IM-Guide-7.5-Underground-Infiltration-Systems.pdf '''here''']<br>

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[[File:MaintenancePICP.png|thumb|400px|A Vacuum Truck used for [[permeable pavement]] maintenance, which sucks up excess sediment and fines trapped between the pores of block pavers. Conducting this maintenance regularly helps maintain the practice's optimal infiltration rate during large rain events. (Source: STEP).]]  

[[File:Catchbasin isnert underground.PNG|thumb|400px|A [[pretreatment]] device (catchbasin insert) upstream of an underground infiltration system inlet in need of cleaning out. These devices are designed to limit the amount of trash, debris, sediment, oil and grease entering the infiltration system, which helps to prevent clogging and maintain its drainage performance (Source: TRCA, 2018<ref name= "example1" /).]]  

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{| class="wikitable" style="width: 800px;"

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|rowspan="5"|'''BMP Excavation and Grading''' - prior to backfilling and installation of geotextile/pipes

|rowspan="4"|'''BMP Excavation and Grading''' - prior to backfilling and installation of geotextile/pipes

|Excavated soil is stockpiled outside the CDA  

|Excavated soil is stockpiled outside the CDA  

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|rowspan="4"|'''BMP Installation''' – after installation of geotextile/ pipes/structures, prior to completion of backfilling

|rowspan="3"|'''BMP Installation''' – after installation of geotextile/ pipes/structures, prior to completion of backfilling

|Installation of structural components (e.g., control manhole, maintenance hatches) is acceptable

|Installation of structural components (e.g., control manhole, maintenance hatches) is acceptable

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