134. The route followed by the water in the permanent volume retention system by at least 80% of the runoff volume to be treated must have a minimum ratio of the width over the length of the flow path of 3 to 1, or a minimum ratio of the flow path over the length of the work of 3 to 1.
A flow path is the route followed by the water between an intake in a storm water management work and the outlet of the work.
871-2020O.C. 871-2020, s. 134.