The Ontario Building Code | Sewage System Design Flows
8.2.1.3. Sewage System design Flows
(1) For residential occupancies, the total daily design sanitary sewage flow shall be at least the value in Column 2 as determined from Table 8.2.1.3.A.
(2) For all other occupancies, the total daily design sanitary sewage flow shall be at least the value in Column 2 as determined from Table 8.2.1.3.B.
(3) Where a building contains more than one establishment, the total daily design sanitary sewage flow shall be the sum of the total daily design sanitary sewageflow for each establishment.
(4) Where an occupancy is not listed in Table 8.2.1.3.B., the highest of metered flow data from at least 3 similar establishments shall be acceptable for determining the total daily design sanitary sewage flow.
Table 8.2.1.3.A.
residential Occupancy
Forming Part of Sentence 8.2.1.3.(1)
| Item | Column 1 residential Occupancy | Column 2 Volume, litres |
| 1. | Apartments, Condominiums, Other Multi-family Dwellings - per person(1) | 275 |
| 2. | Boarding houses |
|
|
| a) Per person, |
|
|
| i) with meals and laundry facilities, or, | 200 |
|
| ii) without meal or laundry facilities, and | 150 |
|
| b) Per non-resident staff per 8 hour shift | 40 |
| 3. | Boarding School - per person | 300 |
| 4. | Dwellings |
|
|
| a) 1 bedroom dwelling | 750 |
|
| b) 2 bedroom dwelling | 1100 |
|
| c) 3 bedroom dwelling | 1600 |
|
| d) 4 bedroom dwelling | 2000 |
|
| e) 5 bedroom dwelling | 2500 |
|
| f) Additional flow for(2) |
|
|
| i) each bedroom over 5, | 500 |
|
| ii) A) each 10 m2 (or part of it) over 200 m2 up to 400 m2 (3) , | 100 |
|
| B) each 10 m2 (or part of it) over 400 m2 up to 600 m2 (3) , and | 75 |
|
| C) each 10 m2 (or part of it) over 600 m2 (3) , or | 50 |
|
| iii) each fixture unit over 20 fixture units | 50 |
| 5. | Hotels and Motels (excluding bars and restaurants) |
|
|
| a) Regular, per room | 250 |
|
| b) Resort hotel, cottage, per person | 500 |
|
| c) Self service laundry, add per machine | 2500 |
| 6. | Work Camp/Construction Camp, semi-permanent per worker | 250 |
Notes to Table 8.2.1.3.A.:
(1) The occupant loadshall be calculated using Subsection 3.1.17.
(2) Where multiple calculations of sanitary sewagevolume is permitted, the calculation resulting in the highest flow shall be used in determining the design daily sanitary sewageflow.
(3) Total finished area, excluding the area of the finished basement.
Table 8.2.1.3.B.
Other Occupancies
Forming Part of Sentence 8.2.1.3.(2)
| Item | Column 1 Establishments(1) | Column 2 Volume, litres |
| 1. | Airports, Bus Terminals, Train Stations, Dock/Port Facilities (Food services excluded) |
|
|
| a) Per passenger, and | 20 |
|
| b) Per employee per 8 hour shift | 40 |
| 2. | Assembly Hall - per seat |
|
|
| a) No food service, or | 8 |
|
| b) Food service provided | 36 |
| 3. | Barber Shop/Beauty Salon - per service chair | 650 |
| 4. | Bowling Alleys (Food service not included) - per lane | 400 |
| 5. | Churches and Similar Places of Worship - per seat |
|
|
| a) No kitchen facilities, or | 8 |
|
| b) Kitchen facilities provided | 36 |
| 6. | Country Club (excluding Food service) |
|
|
| a) Per resident, | 375 |
|
| b) Per employee per 8 hour shift, and | 50 |
|
| c) Per member or patron | 40 |
| 7. | Day Care Facility per person (staff and children) | 75 |
| 8. | Dentist Office |
|
|
| a) Per wet service chair, and | 275 |
|
| b) Per dry service chair | 190 |
| 9. | Doctors Office |
|
|
| a) Per practitioner, and | 275 |
|
| b) Per employee per 8 hour shift | 75 |
| 10. | Factory (excluding process or cleaning waters) - per employee per 8 hour shift |
|
|
| a) No showers, or | 75 |
|
| b) Including showers | 125 |
| 11. | Flea Markets(2) (open not more than 3 days per week) |
|
|
| a) Per non-food service vendor space, | 60 |
|
| b) Per food service establishment / 9.25 m2 of floor space, and | 190 |
|
| c) Per limited food service outlet | 95 |
| 12. | Food service Operations |
|
|
| a) Restaurant (not 24 hour), per seat | 125 |
|
| b) Restaurant (24 hour), per seat | 200 |
|
| c) Restaurant on controlled-access highway, per seat | 400 |
|
| d) Paper service restaurant, per seat | 60 |
|
| e) Donut shop, per seat | 400 |
|
| f) Bar and cocktail lounge, per seat | 125 |
|
| g) Drive-in restaurant per parking space | 60 |
|
| h) Take-out restaurant (no seating area) |
|
|
| i) per 9.25 m2 of floor area, and | 190 |
|
| ii) per employee per 8 hour shift | 75 |
|
| i) Cafeteria - per meal | 12 |
|
| j) Food outlet |
|
|
| i) excluding delicatessen, bakery and meat department, per 9.25 m2 of floor space, | 40 |
|
| ii) per 9.25 m2 of delicatessen floor space, | 190 |
|
| iii) per 9.25 m2 of bakery floor space, | 190 |
|
| iv) per 9.25 m2 of meat department floor space, and | 380 |
|
| v) per water closet | 950 |
| 13. | Hospitals - per bed |
|
|
| a) Including laundry facilities, or | 750 |
|
| b) Excluding laundry facilities | 550 |
| 14. | Long-Term Care Homes, etc. - per bed | 450 |
| 15. | Office Building(3) |
|
|
| a) Per employee per 8 hour shift, or | 75 |
|
| b) Per each 9.3 m2 of floor space | 75 |
| 16. | Public Parks |
|
|
| a) With toilets only per person, or | 20 |
|
| b) With bathhouse, showers, and toilets per person | 50 |
| 17. | Recreational Vehicle or Campground Park |
|
|
| a) Per site without water or sewer hook-up, or | 275 |
|
| b) Per site with water and sewer hook-up | 425 |
| 18. | Schools - per student |
|
|
| a) Day school, | 30 |
|
| b) With showers, | 30 |
|
| c) With cafeteria, and | 30 |
|
| d) Per non-teaching employee per 8 hour shift | 50 |
| 19. | Service Stations (no vehicle washing)(3) |
|
|
| a) Per water closet, and | 950 |
|
| i) per fuel outlet(4), or | 560 |
|
| ii) per vehicle served | 20 |
| 20. | Shopping Centre (excluding food and laundry) - per 1.0 m2 of floor space | 5 |
| 21. | Stadiums, Race Tracks, Ball Parks - per seat | 20 |
| 22. | Stores(3) |
|
|
| a) Per 1.0 m2 of floor area, or | 5 |
|
| b) Per water closet | 1230 |
| 23. | Swimming and Bathing Facilities (Public) - per person | 40 |
| 24. | Theatres |
|
|
| a) Indoor, auditoriums per seat, | 20 |
|
| b) Outdoor, drive-ins per space, or | 40 |
|
| c) Movie theatres per seat | 15 |
| 25. | Veterinary Clinics |
|
|
| a) Per practitioner, | 275 |
|
| b) Per employee per 8 hour shift, and | 75 |
|
| c) Per stall, kennel or cage if floor drain connected | 75 |
| 26. | Warehouse |
|
|
| a) Per water closet, and | 950 |
|
| b) Per loading bay | 150 |
Notes to Table 8.2.1.3.B.:
(1) The occupant load shall be calculated using Subsection 3.1.17.
(2) Flea markets open more than 3 days per week shall be assessed using the volumes stated under the heading "Stores".
(3) Where multiple calculations of sanitary sewage volume is permitted, the calculation resulting in the highest flow shall be used in determining the design daily sanitary sewage flow.
(4) The number of fuel outlets is considered the maximum number of fuel nozzles that could be in use at the same time.