225. A modification to a storm water management system is exempted from authorization pursuant to this Division on the following conditions:(1) the specifications for the work are prepared in accordance with the standard specification BNQ 1809-300 or at least meet the requirements of that specification for the work concerned;
(2) the completion of the work is not likely to cause the discharge or diversion of wastewater into the environment;
(3) if storm water is infiltrated into the soil, the bottom of the works used for infiltration is situated at least 1 m above bedrock level or above the seasonal peak groundwater level established on the basis of the oxidation-reduction level observed;
(3.1) no discharge point is added to the system;
(3.2) if there is relocation of an existing discharge point, the receiving watercourse remains the same;
(4) if the modification involves piping a ditch,(a) the storm water is not diverted to another drainage basin;
(b) the watershed where the storm water is directed contains more than 65% forest cover by area, and less than 10% by area within the urbanization perimeter of a municipality;
(c) (subparagraph revoked);
(d) the discharge point is not located in a lake;
(e) the wastewater cannot come into contact with a wetland not situated on a riverbank or in the littoral zone of a watercourse via surface runoff;
(f) the system does not feed into a combined sewer system;
(5) if the modification concerns the replacement of a pipe in a system in the 10 final metres before the discharge point:(a) if the work is performed by the minister responsible for the respecting roads (chapter V-9), the area of the drained surface, as calculated at the discharge point, remains unchanged and no impermeable surface area is added to the drained surface; (b) in other cases, the diameter of the replacement pipe is equal to or smaller than the initial pipe;
(6) if the modification concerns a flow control device or a water retaining works, the work does not reduce the storage volume of the storm water management works or increase its evacuation capacity.