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Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance
Section 48
Disposition versions
48. Storm water management works must be designed to treat the runoff volume or flow associated with the quality control rain whether the design of the work is based on a runoff volume or flow.
The quality control rain for a storm water management work whose design is based on a runoff volume is rainfall having a total rainfall level of 25 mm.
The quality control rain for a storm water management work whose design is based on a runoff flow is rainfall having an average rain intensity corresponding to 65% of the rain intensity having a 2-year return period based on rainfall intensity-duration-frequency data for a duration that may not exceed the concentration time of the territory draining to a storm water management work established using equation 3-3.
In force: 2020-12-31
48. Storm water management works must be designed to treat the runoff volume or flow associated with the quality control rain whether the design of the work is based on a runoff volume or flow.
The quality control rain for a storm water management work whose design is based on a runoff volume is rainfall having a total rainfall level of 25 mm.
The quality control rain for a storm water management work whose design is based on a runoff flow is rainfall having an average rain intensity corresponding to 65% of the rain intensity having a 2-year return period based on rainfall intensity-duration-frequency data for a duration that may not exceed the concentration time of the territory draining to a storm water management work established using equation 3-3.
