Changes

'''Visual Inspection (Level 1)'''

'''Visual Inspection (Level 1)'''<br>

This qualitative method is low cost and requires minimal effort to conduct. Visual inspection should be used as an initial step to determine if the LID practice is operating properly. Visual inspections can be performed during dry weather and wet weather to examine various aspects of LID performance, such as the following:

This qualitative method is low cost and requires minimal effort to conduct. Visual inspection should be used as an initial step to determine if the LID practice is operating properly. Visual inspections can be performed during dry weather and wet weather to examine various aspects of LID performance, such as the following:

*draw-down time

*draw-down time

[[File:Double ring.JPG|300px|thumb|right|Double-ring infiltrometer.]]

[[File:Double ring.JPG|300px|thumb|right|Double-ring infiltrometer.]]

'''Surface Infiltration Capacity Testing (Level 2)'''

'''Surface Infiltration Capacity Testing (Level 2)'''<br>

Level 2 includes the employment of quantitive methods of testing and data collection. These tasks are also cost-effective and can establish if the LID feature was built in conformance with the design specifications. Some level 2 tests include the following:

Level 2 includes the employment of quantitive methods of testing and data collection. These tasks are also cost-effective and can establish if the LID feature was built in conformance with the design specifications. Some level 2 tests include the following:

*soil sampling and testing

*soil sampling and testing

'''Continuous Water Level Monitoring (Level 3)'''

'''Continuous Water Level Monitoring (Level 3)'''<br>

Site infiltration rates can be measured with greater accuracy through continuous water level monitoring. This monitoring approach evaluates seasonal infiltration performance through the monitoring of temperature and groundwater levels. The following conditions and equipment are necessary for continuous water level monitoring:

Site infiltration rates can be measured with greater accuracy through continuous water level monitoring. This monitoring approach evaluates seasonal infiltration performance through the monitoring of temperature and groundwater levels. The following conditions and equipment are necessary for continuous water level monitoring:

#A perforated observation well

#A perforated observation well

</gallery>

</gallery>

'''Long-term Monitoring (Level 4)'''

'''Long-term Monitoring (Level 4)'''<br>

High-intensity monitoring is a comprehensive but expensive approach to assessing peak flow reduction and water volume reduction during natural runoff events. These reductions can be quantified by completing a water budget during natural storm events, specifically through the measurement of inflow and outflow. Pollutant load reductions can also be quantified with the appropriate technology. Long-term monitoring is especially recommended if the LID feature that is the subject of the test is the first of its kind in its given jurisdiction, if geologic conditions pose a concern, or if the feature is being implemented to protect sensitive and significant natural features.

High-intensity monitoring is a comprehensive but expensive approach to assessing peak flow reduction and water volume reduction during natural runoff events. These reductions can be quantified by completing a water budget during natural storm events, specifically through the measurement of inflow and outflow. Pollutant load reductions can also be quantified with the appropriate technology. Long-term monitoring is especially recommended if the LID feature that is the subject of the test is the first of its kind in its given jurisdiction, if geologic conditions pose a concern, or if the feature is being implemented to protect sensitive and significant natural features.

For greater detail on certification protocols see: [[https://cvc.ca/wp-content/uploads//2021/07/2016-04-21-web-version-CVCbioretentionCertificationProtocols.pdf | Low Impact Development Certification Protocols: Bioretention practices]]

For greater detail on certification protocols see: [[https://cvc.ca/wp-content/uploads//2021/07/2016-04-21-web-version-CVCbioretentionCertificationProtocols.pdf | Low Impact Development Certification Protocols: Bioretention practices]]