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Line 152: − − [[File:Monitoring well chamber.PNG|450px|thumb|Image of a monitoring well installed in a manhole with a submersible calibrated pressure transducer to provide continuous water level measurements, drainage times and infiltration rates of the associated studied infiltration chamber, located in Richmond Hill, Ontario.<ref>Young, D. Van Seters, T., Graham, C. 2013. Evaluation of Underground Stormwater Infiltration − Systems. Toronto and Region Conservation Authority. Toronto, Ontario.</ref>]] + −
→Design
===Perforated pipes===
===Perforated pipes===
Continuously perforated, smooth interior HDPE or PVC drainage pipe, ≥200 mm interior diameter where possible to reduce risk of freezing and facilitate push camera inspection and cleaning with jet nozzle equipment. Including geotextile socks around perforated pipes is optional. May include an orifice plate or valve flow restrictor to provide erosion control and optimize infiltration.
Continuously perforated, smooth interior HDPE or PVC drainage pipe, ≥200 mm interior diameter where possible to reduce risk of freezing and facilitate push camera inspection and cleaning with jet nozzle equipment. Including geotextile socks around perforated pipes is optional. May include an orifice plate or valve flow restrictor to provide erosion control and optimize infiltration.
[[File:Monitoring well chamber.PNG|450px|thumb|Image of a monitoring well installed in a manhole with a submersible calibrated pressure transducer to provide continuous water level measurements, drainage times and infiltration rates of the associated studied infiltration chamber, located in Richmond Hill, Ontario.<ref>Young, D. Van Seters, T., Graham, C. 2013. Evaluation of Underground Stormwater Infiltration
Systems. Toronto and Region Conservation Authority. Toronto, Ontario.</ref>]]
===Conveyance and Overflow===
===Conveyance and Overflow===
===Monitoring Wells===
===Monitoring Wells===
Recommended for monitoring drainage time between storms. Monitoring well should be a vertical standpipe consisting of an anchored 100 to 150 mm diameter pipe with perforations along the length within the reservoir, installed to the bottom of the facility, with a lockable cap. Flow-splitting manholes may also be used for drainage time monitoring.
Recommended for monitoring drainage time between storms. Monitoring well should be a vertical standpipe consisting of an anchored 100 to 150 mm diameter pipe with perforations along the length within the reservoir, installed to the bottom of the facility, with a lockable cap. Flow-splitting manholes may also be used for drainage time monitoring.
===Access Structures===
===Access Structures===
Manholes or maintenance hatches connected to infiltration chambers, or standpipe inspection ports connected to infiltration trench or soakaway perforated pipe that provide access for inspection and maintenance. Should be installed at inlets and outlets at a minimum. Couplings used for standpipe connections should be 45° to facilitate pipe access by push camera and jet nozzle cleaning equipment.
Manholes or maintenance hatches connected to infiltration chambers, or standpipe inspection ports connected to infiltration trench or soakaway perforated pipe that provide access for inspection and maintenance. Should be installed at inlets and outlets at a minimum. Couplings used for standpipe connections should be 45° to facilitate pipe access by push camera and jet nozzle cleaning equipment.
[[File:Infiltration Chamber Edited.jpg|800px|]]
[[File:Infiltration Chamber Edited.jpg|800px|]]