Q-2, r. 22 - Regulation respecting waste water disposal systems for isolated dwellings

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1.3. Hydraulic capacity: For the purposes of sections 11.1, 16.2 and 87.8, the hydraulic capacity of an individual waste water disposal system complying with NQ Standard 3680-910 must be equal to or greater than,
(a)  in the case of an isolated dwelling, the following hydraulic capacities established according to the number of bedrooms of the dwelling concerned:
    
 Number of bedroomsHydraulic capacity (litres) 
 1540 
 21,080 
 31,260 
 41,440 
 51,800 
 62,160 
    
(b)  in other cases, the total daily flow of discharged waste water.
The same applies for the purposes of section 87.14, except in respect of the hydraulic capacity of an individual waste water disposal system serving a group of 2 isolated dwellings referred to in subparagraph i of subparagraph b of the first paragraph of section 3.01, which must be equal to or greater than the following hydraulic capacities, established according to the number of bedrooms in the group concerned:
    
 Number of bedrooms in the groupHydraulic capacity (litres) 
 21,080 
 31,800 
 42,160 
 5 and 63,240 
    
O.C. 786-2000, s. 2; 306-2017O.C. 306-2017, s. 3.
1.3. Hydraulic capacity: For the purposes of sections 11.1, 16.2, 87.8 and 87.14, the hydraulic capacity of an individual waste water treatment system complying with NQ Standard 3680-910 must be equal to or greater than the total daily flow of an isolated dwelling according to the number of bedrooms as below:

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Number of bedrooms Total daily flow (litres)
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1 540
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2 1080
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3 1260
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4 1440
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5 1800
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6 2160
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In the case of another building, the hydraulic capacity of an individual waste water treatment system must be equal to or greater than the total daily flow of waste water, grey water and toilet effluents from that building.
O.C. 786-2000, s. 2.