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Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance
Section 137
Disposition versions
137. The maintenance program must include
(1) an estimate of the expected reserve volume for the accumulation of sediments in the water and sediment accumulation zone and, where applicable, in the pretreatment work;
(2) the expected number of years of operation without maintenance of the permanent volume retention system, expressed in years, established using equation 4-14:
Equation 4-14 N = VMES/(Msed. × Aimp × P/100)
where:
| N | = | Estimate of the expected number of years of operation without maintenance (year); minimum value: 5; | |
| VMES | = | Reserve volume for the accumulation of sediments in the permanent volume retention system (m3); | |
| Msed. | = | Volume of sediments produced per year per hectare (m3/year/ha): minimum value: 0.68; | |
| Aimp | = | Area of impervious surfaces drained to the permanent volume retention system (ha); | |
| P | = | Suspended matter reduction performance determined in accordance with figure 4.5 (%). |
(3) the minimum value of the water depth of the volume of permanent water in the water and sediment accumulation zone to be complied with and the site where the observation must be made;
(4) the need to proceed to the maintenance of the water and sediment accumulation zone where the minimum value of the water depth observed at the site provided for in paragraph 3 is less than the value to be complied with;
(5) the need to proceed, where applicable, to the maintenance of the pretreatment work where the accumulation of sediments reaches the mark affixed on the sediment level indicator;
(6) the water discharge curve of the permanent volume retention system according to the water level;
(7) the curve describing the storage volume according to the water level;
(8) the water level from which the permanent volume retention system overflows at its lowest point.
In force: 2020-12-31
137. The maintenance program must include
(1) an estimate of the expected reserve volume for the accumulation of sediments in the water and sediment accumulation zone and, where applicable, in the pretreatment work;
(2) the expected number of years of operation without maintenance of the permanent volume retention system, expressed in years, established using equation 4-14:
Equation 4-14 N = VMES/(Msed. × Aimp × P/100)
where:
| N | = | Estimate of the expected number of years of operation without maintenance (year); minimum value: 5; | |
| VMES | = | Reserve volume for the accumulation of sediments in the permanent volume retention system (m3); | |
| Msed. | = | Volume of sediments produced per year per hectare (m3/year/ha): minimum value: 0.68; | |
| Aimp | = | Area of impervious surfaces drained to the permanent volume retention system (ha); | |
| P | = | Suspended matter reduction performance determined in accordance with figure 4.5 (%). |
(3) the minimum value of the water depth of the volume of permanent water in the water and sediment accumulation zone to be complied with and the site where the observation must be made;
(4) the need to proceed to the maintenance of the water and sediment accumulation zone where the minimum value of the water depth observed at the site provided for in paragraph 3 is less than the value to be complied with;
(5) the need to proceed, where applicable, to the maintenance of the pretreatment work where the accumulation of sediments reaches the mark affixed on the sediment level indicator;
(6) the water discharge curve of the permanent volume retention system according to the water level;
(7) the curve describing the storage volume according to the water level;
(8) the water level from which the permanent volume retention system overflows at its lowest point.
