Q-2, r. 9.01 - Design code of a storm water management system eligible for a declaration of compliance

Section 153 Disposition versions

2020-12-31

153. A test for resuspension is successful where the concentration of suspended matters at the effluent is less than 20 mg/L for a series configuration and 10 mg/L for a parallel configuration, after correction to take into account the concentration of raw water and the smallest particle that may be intercepted during the suspended matter reduction performance.

For the purposes of the correction provided for in the first paragraph,

(1)  a 5 μm particle size must be postulated in raw water if no granulometric analysis of the suspended matters contained in the raw water has been conducted;

(2)  the size of the smallest particle that may be intercepted for a given loading rate corresponds to D5 of the granulometric curve of particles found in the tank following suspended matter removal tests conducted at 25% of the given loading rate; D5 is the diameter corresponding to the point on the granulometric curve where the percentage of passing particles is 5%; linear interpolation is allowed to obtain D5.

O.C. 871-2020, s. 153.

Not in force

In force: 2020-12-31

153. A test for resuspension is successful where the concentration of suspended matters at the effluent is less than 20 mg/L for a series configuration and 10 mg/L for a parallel configuration, after correction to take into account the concentration of raw water and the smallest particle that may be intercepted during the suspended matter reduction performance.

For the purposes of the correction provided for in the first paragraph,

(1)  a 5 μm particle size must be postulated in raw water if no granulometric analysis of the suspended matters contained in the raw water has been conducted;

(2)  the size of the smallest particle that may be intercepted for a given loading rate corresponds to D5 of the granulometric curve of particles found in the tank following suspended matter removal tests conducted at 25% of the given loading rate; D5 is the diameter corresponding to the point on the granulometric curve where the percentage of passing particles is 5%; linear interpolation is allowed to obtain D5.

O.C. 871-2020, s. 153.