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*[https://static1.squarespace.com/static/5f8dbde10268ab224c895ad7/t/604926dae8a36b0ee128f8ac/1615406817379/2009MonitoringManualSingleFile.pdf Urban Stormwater BMP Performance Monitoring] (Geosyntec Engineers and Wright Water Engineers, 2009)<ref>Geosyntec Consultants and Wright Water Engineers. 2009. Urban Stormwater BMP Performance Monitoring. Prepared under Support from U.S. Environmental Protection Agency, Water Environment Research Foundation, Federal Highway Administration, Environmental and Water Resources Institute of the American Society of Civil Engineers. Published October 2009. https://static1.squarespace.com/static/5f8dbde10268ab224c895ad7/t/604926dae8a36b0ee128f8ac/1615406817379/2009MonitoringManualSingleFile.pdf</ref>;
*[https://static1.squarespace.com/static/5f8dbde10268ab224c895ad7/t/604926dae8a36b0ee128f8ac/1615406817379/2009MonitoringManualSingleFile.pdf Urban Stormwater BMP Performance Monitoring] (Geosyntec Engineers and Wright Water Engineers, 2009)<ref>Geosyntec Consultants and Wright Water Engineers. 2009. Urban Stormwater BMP Performance Monitoring. Prepared under Support from U.S. Environmental Protection Agency, Water Environment Research Foundation, Federal Highway Administration, Environmental and Water Resources Institute of the American Society of Civil Engineers. Published October 2009. https://static1.squarespace.com/static/5f8dbde10268ab224c895ad7/t/604926dae8a36b0ee128f8ac/1615406817379/2009MonitoringManualSingleFile.pdf</ref>;
*[https://www3.epa.gov/npdes/pubs/stormwaterinthecommunity.pdf Center for Watershed Protection, Managing Stormwater Post-Construction Guide, BMP Performance Verification Tool (Tool 8) Appendix A] (CWP, 2008)<ref>Center for Watershed Protection (CWP). 2008. Managing Stormwater in Your Community – A Guide for Building and Effective Post-Construction Program. U.S. EPA Publication No: 833-R08-001. Ellicott City, MD. EPA Publication No: 833-R-08-001. https://www3.epa.gov/npdes/pubs/stormwaterinthecommunity.pdf</ref>
*[https://www3.epa.gov/npdes/pubs/stormwaterinthecommunity.pdf Center for Watershed Protection, Managing Stormwater Post-Construction Guide, BMP Performance Verification Tool (Tool 8) Appendix A] (CWP, 2008)<ref>Center for Watershed Protection (CWP). 2008. Managing Stormwater in Your Community – A Guide for Building and Effective Post-Construction Program. U.S. EPA Publication No: 833-R08-001. Ellicott City, MD. EPA Publication No: 833-R-08-001. https://www3.epa.gov/npdes/pubs/stormwaterinthecommunity.pdf</ref>
*[http://archive.phillywatersheds.org/ltcpu/GCCW%20Comprehensive%20Monitoring%20Plan%20Sections%201-10.pdf Green Cities, Clean Waters Comprehensive Monitoring Plan, Appendices C and D] (City of Philadelphia, 2014)<ref>. City of Philadelphia. 2014. Green City, Clean Waters: Comprehensive Monitoring Plan. The Philadelphia Water Department. Philadephia, PA. http://archive.phillywatersheds.org/ltcpu/GCCW%20Comprehensive%20Monitoring%20Plan%20Sections%201-10.pdf</ref>
*[http://archive.phillywatersheds.org/ltcpu/GCCW%20Comprehensive%20Monitoring%20Plan%20Sections%201-10.pdf Green Cities, Clean Waters Comprehensive Monitoring Plan, Appendices C and D] (City of Philadelphia, 2014)<ref name="example4">. City of Philadelphia. 2014. Green City, Clean Waters: Comprehensive Monitoring Plan. The Philadelphia Water Department. Philadephia, PA. http://archive.phillywatersheds.org/ltcpu/GCCW%20Comprehensive%20Monitoring%20Plan%20Sections%201-10.pdf</ref>
===Drainage Performance Evaluations ===
===Drainage Performance Evaluations ===
It is recommended that at a minimum, the drainage performance of stormwater infiltration BMPs be evaluated as part of Assumption and Verification inspections. Drainage performance, or the ability of the BMP to fully drain runoff from a certain size storm event within a certain time period, can be evaluated by continuous monitoring during natural or simulated storm events. When a water source of sufficient size to fill the sub-surface water storage reservoir is available, it is recommended that drainage performance evaluations be performed by simulated storm event testing as results can be produced within a much shorter time period (e.g., within a week) as opposed to natural storm event testing, which can require field monitoring activities over 6 months to 2 years in duration.
It is recommended that at a minimum, the drainage performance of stormwater infiltration BMPs be evaluated as part of Assumption and Verification inspections. Drainage performance, or the ability of the BMP to fully drain runoff from a certain size storm event within a certain time period, can be evaluated by continuous monitoring during natural or simulated storm events. When a water source of sufficient size to fill the sub-surface water storage reservoir is available, it is recommended that drainage performance evaluations be performed by simulated storm event testing as results can be produced within a much shorter time period (e.g., within a week) as opposed to natural storm event testing, which can require field monitoring activities over 6 months to 2 years in duration.
[[File:Data logger wells.PNG|thumb|500px|Diagram of a typical water level logger installation in an infiltration BMP sub-surface water storage reservoir monitoring well (City of Philadelphia, 2014)<ref name="example4" />.]]
The general approach involves installing water level logger sensors (i.e., pressure transducers) in:
The general approach involves installing water level logger sensors (i.e., pressure transducers) in: