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==Construction Inspection Tasks==

==Construction Inspection Tasks==

[[File:LID-IM small.jpg|thumb|400px|Performance Inspection of a Rain garden. [https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/low-impact-development/low-impact-development-stormwater-practice-inspection-and-maintenance-guide/ Photo source: TRCA].<ref>TRCA. 2019. Low Impact Development Stormwater Inspection and Maintenance Guide. https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/low-impact-development/low-impact-development-stormwater-practice-inspection-and-maintenance-guide/</ref>]]

[[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).]]  

Construction inspections take place during several points in the construction sequence, specific to the type of LID BMP, but at a minimum should be done '''weekly''' and include the following:

Construction inspections take place during several points in the construction sequence, specific to the type of LID BMP, but at a minimum should be done '''weekly''' and include the following:

# During site preparation, prior to BMP excavation and grading to ensure the CDA is stabilized and/or flow diversion devices are in place and confirm that construction materials meet design specifications

# During site preparation, prior to BMP excavation and grading to ensure the CDA is stabilized and/or flow diversion devices are in place and confirm that construction materials meet design specifications

# 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 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 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>

{| class="wikitable" style="width: 1000px;"

{| class="wikitable" style="width: 1000px;"

|+'''Bioretention/Swales: Construction Inspections'''

|+'''Bioretention/Swales: Construction Inspections'''

!<br>'''<u><span title="Note for Observation Column: S = Satisfactory; U= Unsatisfactory; NA = Not Applicable ">Observations*</u>'''<br>

!<br>'''<u><span title="Note for Observation Column: S = Satisfactory; U= Unsatisfactory; NA = Not Applicable ">Observations*</u>'''<br>

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|rowspan="6"|'''Site Preparation''' - after site clearing and grading, prior to BMP excavation and grading

|rowspan="7"|'''Site Preparation''' - after site clearing and grading, prior to BMP excavation and grading

|Natural heritage system and tree protection areas remain fenced off

|Natural heritage system and tree protection areas remain fenced off

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

|rowspan="3"|'''BMP Excavation and Grading''' - prior to backfilling and installation of pipes/catchbasins

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|Embankments/berms (elevations, slopes, compaction) are acceptable  

|Excavation location, footprint, depth and slope are acceptable  

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|rowspan="6"|'''BMP Installation''' – after installation of pipes/catchbasins, prior to completion of backfilling  

|Structural components (e.g., pavement base, curbs) installation is acceptable

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

|Structural components (e.g., foundation, walls) installed according to plans, if applicable

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|rowspan="4"|'''Landscaping''' – after final grading, prior to planting

|Surface coarse installation (elevation, slope, monitoring wells) is acceptable

|Maximum surface ponding depth is acceptable

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