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Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance
Section 58
Disposition versions
58. A level 1 or level 2 pretreatment work must be installed for each intake of the dry retention system or the permanent volume retention system whose purpose is to reduce suspended matters through which travels storm water from at least 10% of the surfaces drained by the dry retention system or the permanent volume retention system.
A level 1 preteatment work allows the withdrawal of at least 35% of suspended matters or the removal of at least 120 μm of particles during the passage of the runoff flow to be treated. A level 2 preteatment work allows the withdrawal of at least 50% of suspended matters or the removal of at least 65 μm of particles during the passage of the runoff flow to be treated.
In force: 2020-12-31
58. A level 1 or level 2 pretreatment work must be installed for each intake of the dry retention system or the permanent volume retention system whose purpose is to reduce suspended matters through which travels storm water from at least 10% of the surfaces drained by the dry retention system or the permanent volume retention system.
A level 1 preteatment work allows the withdrawal of at least 35% of suspended matters or the removal of at least 120 μm of particles during the passage of the runoff flow to be treated. A level 2 preteatment work allows the withdrawal of at least 50% of suspended matters or the removal of at least 65 μm of particles during the passage of the runoff flow to be treated.
