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Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance
Section 10
Disposition versions
10. A permanent volume retention system that also reduces the concentration of suspended matters must include a pretreatment work upstream from the system.
A pretreatment system is not required if
(1) the storm water comes from a territory whose dominant use class is residential and is served by a road network whose estimated annual average daily traffic is less than 500 vehicles; or
(2) the sum of the impervious surface drained to the permanent volume retention system does not exceed 250 m2.
In force: 2020-12-31
10. A permanent volume retention system that also reduces the concentration of suspended matters must include a pretreatment work upstream from the system.
A pretreatment system is not required if
(1) the storm water comes from a territory whose dominant use class is residential and is served by a road network whose estimated annual average daily traffic is less than 500 vehicles; or
(2) the sum of the impervious surface drained to the permanent volume retention system does not exceed 250 m2.
