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S-2.1, r. 13 - Regulation respecting occupational health and safety

Schedule
Disposition versions

Full text
SCHEDULE III
(s. 103)
MINIMUM RATE OF AIR CHANGE PER HOUR
Table 1
AVERAGE GENERAL VENTILATION


Classification of establishments Minimum rate of air
change per hour

Food and beverages
______________________________________________________________________________

Slaughterhouses and drysalting 2
______________________________________________________________________________

Mineral oil and fats factories 3
______________________________________________________________________________

Sausage and sausage casing manufacturing 2
______________________________________________________________________________

Poultry processing 2
______________________________________________________________________________

Milk concentrate manufacturing 2
______________________________________________________________________________

Fish processing 2
______________________________________________________________________________

Preparation and canning of fruit and vegetables 2
______________________________________________________________________________

Biscuit manufacturing 2
______________________________________________________________________________

Bakeries 2
______________________________________________________________________________

Confectioneries 2
______________________________________________________________________________

Vegetable oil mills 2
______________________________________________________________________________

Distilleries 2
______________________________________________________________________________

Breweries (Beer breweries) 2
______________________________________________________________________________

Wine manufacturing 2

Tobacco products
______________________________________________________________________________

Leaf-tobacco processing 2
______________________________________________________________________________

Tobacco products manufacturing 2

Rubber
______________________________________________________________________________

Rubber footwear manufacturing 3
______________________________________________________________________________

Tire and tube manufacturing 3
______________________________________________________________________________

Other rubber industries 3

Leather
______________________________________________________________________________

Tanneries 3
______________________________________________________________________________

Shoe factories 2

Textiles
______________________________________________________________________________

Cotton yarn and cloth mills 2
______________________________________________________________________________

Wool yarn mills 2
______________________________________________________________________________

Wool cloth mills 2
______________________________________________________________________________

Synthetic textile mills 2
______________________________________________________________________________

Fiber preparation mills 5
______________________________________________________________________________

Thread mills 5
______________________________________________________________________________

Cordage and twine industry 5
______________________________________________________________________________

Carpet, mat and rug industry 2
______________________________________________________________________________

Textile dying and finishing 3
______________________________________________________________________________

Linoleum and coated fabrics industry 4

Garages
______________________________________________________________________________

Garage for maintenance and repair 4
______________________________________________________________________________

Garage for parking and storage
- with permanent employees 3
______________________________________________________________________________

- without permanent employees 2

Wood
______________________________________________________________________________

Shingle plants 2
______________________________________________________________________________

Sawmills 2
______________________________________________________________________________

Veneer and plywood mills 2
______________________________________________________________________________

Sash, door and other millwood plants (excluding hardwood
flooring manufacturing) 2
______________________________________________________________________________

Coffin and casket industry 2
______________________________________________________________________________

Wood processing industry 2

Furniture and fixtures
______________________________________________________________________________

Household furniture industry 2

Paper and related products
______________________________________________________________________________

Pulp and paper mills 2
______________________________________________________________________________

Manufacturing of asphalt roofing paper 3
______________________________________________________________________________

Paper box and bag manufacturing 2

Metal products
______________________________________________________________________________

Metal fabricating industries 4
______________________________________________________________________________

Miscellaneous machinery manufacturing 2
______________________________________________________________________________

Electrical appliance manufacturing 2
______________________________________________________________________________

Cell and battery manufacturing 4

Non-metallic products
______________________________________________________________________________

Cement industry 3
______________________________________________________________________________

Lime industry 3
______________________________________________________________________________

Gypsum products manufacturing 3
______________________________________________________________________________

Concrete products manufacturing 2
______________________________________________________________________________

Reinforced concrete industry 2
______________________________________________________________________________

Clay products manufacturing (domestic clay) 2
______________________________________________________________________________

Refractory products manufacturing 4
______________________________________________________________________________

Stone products manufacturing 4
______________________________________________________________________________

Asbestos products manufacturing 6
______________________________________________________________________________

Glass and glass products manufacturing 4
______________________________________________________________________________

Abrasive industry 4

Chemicals
______________________________________________________________________________

Explosives and ammunition manufacturing 3
______________________________________________________________________________

Mixed fertilizers manufacturing 2
______________________________________________________________________________

Plastics and synthetic resins industry 3
______________________________________________________________________________

Pharmaceuticals and medical products industry 2
______________________________________________________________________________

Paints and varnish industry 4
______________________________________________________________________________

Maintenance products manufacturing 3
______________________________________________________________________________

Industrial chemical products manufacturing 2

Warehouses: See Table III of this Schedule.
Any other class of establishment not appearing in this
Table or in Table II of this Schedule 1
The number of air changes per hour listed in this Table may be converted into cfm/ft2 by using the following formula:
ft3/min.=Air change/hour × [12ft + height of work level in feet (ref. main floor)]
_____ _______________
ft2 60 min./hour
or to m3/h/m2 by using the following formula:
m3/h = Air change/hour × [3.6m + height of work level in metres (ref. main floor)]
___
m2
Table 2
RATE OF AIR CHANGE PER HOUR FOR CERTAIN CLASSES OF ESTABLISHMENT


Classification Total ventilation area Fresh air
of
establishment ________________________________________________ Relative pressure

Unrefrigerated Refrigerated Refrigerated or
spaces spaces unrefrigerated
(l./s./pers.) (l./s./pers.) spaces
(l./s./pers.)

Commercial 9.4 not 2.4 negative pressure
and industrial applicable not exceeding
laundry 5 Pa

Office 7.1 45 2.4 not applicable

Laboratory* 7.1 45 2.4 negative pressure
not exceeding
5 Pa
Where gases, fumes, vapours, dusts or are mists emitted in an establishment listed in this Table, the minimum rates of air change per hour must be increased so that the standards prescribed in Schedule 1 are complied with.
* To compute total ventilation air and fresh air, the occupancy rate must be one person per 10 m2 for laundries and offices and one person per 5 m2 for laboratories.
Table 3
VENTILATION IN WAREHOUSES WHERE INTERNAL COMBUSTION VEHICLES ARE OPERATED
The ventilation rate per vehicle must be computed as follows:
Q = K × (U/50 %) × (P/45kW) × [2 - (V/4250m3)]
where:
Q = air flow in m3/h prescribed per vehicle
K = ventilation constant, namely 8 500 m3/h per propane or diesel-powered vehicle, 13,500 m3/h per gas-powered vehicle
P = power of the engine in kilowatts
V = volume of space available in m3 per vehicle
U = percentage (%) of use of the vehicle during a work shift.
Notes:
(1) if the percentage (U) of use of the vehicle or the power (P) of the engine is less than 50% or 45 KW respectively, these factors must be omitted in the formula which then must read as follows:
Q = K × [2 - (V/4250m3)]
(2) for the purposes of applying this Table, the volume of space available is equal to the total volume of the warehouse minus the volume occupied by the merchandise;
(3) if the volume available exceeds 4,250 m3, the formula does not apply and the minimum air supply is 8,500 m3/h per propane or diesel-powered vehicle and 13,500 m3/h per gas-powered vehicle.
O.C. 885-2001, Sch. III.
© Gouvernement du Québec