Changes

==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: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>]]

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 or that adequate ESCs 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 that adequate ESCs and flow diversion devices are in place and confirm that construction materials meet design specifications

# At completion of excavation and grading, prior to installation of pipes/sewers and backfilling to ensure depths, slopes and elevations are acceptable

# At completion of excavation and grading, prior to backfilling and installation of cistern and pipes to ensure depths, slopes and elevations are acceptable

# At completion of installation of pipes/sewers, prior to backfilling to ensure slopes and elevations are acceptable

# At completion of installation of cistern and pipes, prior to completion of backfilling to ensure 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 [https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf Erosion Sediment Controls (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/7/7f/Construction_Inspection.pdf '''here''']<br>

# After every large storm event (e.g., 15 mm rainfall depth or greater) to ensure [https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf Erosion Sediment Controls (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/e/e9/LID-IM-Guide-7.7-Rainwater-Cisterns.pdf '''here''']<br>

 

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

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

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

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

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

|rowspan="2"|'''BMP Excavation and Grading''' - prior to backfilling and installation of cistern and conveyance pipes  

|Excavation location, footprint, depth and slopes are acceptable  

|Excavation location, footprint, depth and slopes are acceptable  

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|Excavated soil is stockpiled outside the CDA

|Installations of [[underdrains|underdrains/sub-drain pipes]] (location, elevation, slope) are acceptable

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

|rowspan="2"|'''BMP Installation''' – after installation of pipes/sewers, prior to backfilling

|Installation of structural components (i.e., pretreatment devices, inlets, cistern, overflow outlet, pump, make-up water supply and backflow preventer valve, control manhole/ access hatch) are acceptable and functioning

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