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[[File:Cover page underground.PNG|thumb|750px|link=https://sustainabletechnologies.ca/app/uploads/2018/02/Underground-Infiltration-Systems-Fact-Sheet.pdf|Inspection & Maintenance Guidance of underground infiltration systems' best management practices that refers to LIDs that capture and temporarily store rainwater and snowmelt from hard surfaces (e.g., roofs and pavements) below ground in [[geotextile]] filter fabric lined excavations filled with washed [[gravel]] or other void space forming structures (TRCA, 2018)<ref> TRCA. 2018. Fact Sheet - Inspection and Maintenance of Stormwater Best Management Practices: Underground Infiltration Systems. https://sustainabletechnologies.ca/app/uploads/2018/02/Underground-Infiltration-Systems-Fact-Sheet.pdf</ref>]]

[[File:Cover page underground.PNG|thumb|750px|link=https://sustainabletechnologies.ca/app/uploads/2018/02/Underground-Infiltration-Systems-Fact-Sheet.pdf|Inspection & Maintenance Guidance of underground infiltration systems' best management practices that refers to LIDs that capture and temporarily store rainwater and snowmelt from hard surfaces (e.g., roofs and pavements) below ground in [[geotextile]] filter fabric lined excavations filled with washed [[gravel]] or other void space forming structures (TRCA, 2018)<ref name="example1"> TRCA. 2018. Fact Sheet - Inspection and Maintenance of Stormwater Best Management Practices: Underground Infiltration Systems. https://sustainabletechnologies.ca/app/uploads/2018/02/Underground-Infiltration-Systems-Fact-Sheet.pdf</ref>]]

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[[File:Plan & profile view Infilt underground.PNG|thumb|400px|General plan and profile (cross-section) views showcasing key components and sections of a typical [[infiltration trench]].]]

[[File:Infiltration before cleanout infiltr.PNG|thumb|400px|An inlet to an infiltration trench during the fall in need of maintenance (TRCA, 2018).<ref name="example1" />]]

{{textbox|Key components of Underground Infiltration Systems to pay close attention to are the:  

{{textbox|Key components of Underground Infiltration Systems to pay close attention to are the:  

==Inspection and Testing Framework==

==Inspection and Testing Framework==

[[File:Soakaway monitorign well.PNG|thumb|300px|An example of a soakaway under construction with a newly installed monitoring well. To ensure performance assessment and infiltration testing can be conducted efficiently over the life cycle of this LID feature, the well condition must stay in good condition and be repaired immediately upon notice of significant damage.]]

[[File:Soakaway monitorign well.PNG|thumb|300px|An example of a soakaway under construction with a newly installed monitoring well. To ensure performance assessment and infiltration testing can be conducted efficiently over the life cycle of this LID feature, the well condition must stay in good condition and be repaired immediately upon notice of significant damage (TRCA, 2018).<ref name="example1" />]]

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|+'''Visual Indicators Framework - Underground Infiltration Systems'''

|+'''Visual Indicators Framework - Underground Infiltration Systems'''

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[[File:Sediment accumulation perm.JPG|thumb|300px|Permeable pavement in need of maintenance as excess sediment and unwanted vegetation growth has begun to occur near the perimeter of the installation. Source: (TRCA, 2016).<ref>STEP. 2018. Fact Sheet - Inspection and Maintenance of Stormwater Best Management Practices: Permeable Pavements. https://sustainabletechnologies.ca/app/uploads/2018/02/Permeable-Pavement-Fact-Sheet.pdf</ref>.]]

[[File:Soakaway monitorign well.PNG|thumb|300px|An example of a soakaway under construction with a newly installed monitoring well. To ensure performance assessment and infiltration testing can be conducted efficiently over the life cycle of this LID feature, the well condition must stay in good condition and be repaired immediately upon notice of significant damage (TRCA, 2018)<ref name="example1" />.]]

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