77. (1) The construction or alteration of a building intended for use as a plant shall be made so that, (a)  the floors of all rooms in which milk or milk products are handled, processed or stored are of concrete or other material impervious to liquids and, except if there is no risk of liquid accumulation on the floor, have adequate slope towards a floor drain; (b)  each room in which milk or milk products are processed or stored has a trapped drain capable of draining any liquids from the floor, except if there is no risk of liquid accumulation on the floor; (c)  each wall in a room in which milk or milk products are handled, processed or stored has a base at least 15 centimetres above the floor level made of concrete or other waterproof material, and the joint between the floor and the base is watertight; (d)  moisture accumulation on ceilings, walls, overhead lines and overhead equipment is avoided when the plant is operational; (e)  the surfaces of the walls and ceilings of all rooms in which milk or milk products are handled, processed or stored are of washable and moisture-proof material; (f)  there is provision for equipping all openings with screens or other approved equipment capable of preventing the entry of flies or other insects and all doors with self-closing devices or equivalent methods of ensuring that  flies or other insects do not enter; (g)  rooms where milk and cream are handled or processed contain provision for lighting that is shatterproof or covered with a protective shield, ventilating and heating; (h)  the ceilings in the plant are insulated and sealed against infiltration of dampness or vapour, with free circulation of air between the insulation and the roof; (i)  a washroom does not open directly into a room where milk or milk products are handled or processed and doors are equipped with a self-closing device; (j)  sewage is carried from the building by pipes, each of which contains a trap in an accessible location and connects with a municipal sewer or septic tank; (k)  any heating unit is located in a room that has a concrete floor and that is not used for the handling, processing or storing of milk or milk products; (l)  in the case of, (i)  a cheese factory, there is a curing room large enough for the operation intended, and (ii)  Revoked: O. Reg. 61/22, s. 8 (1). (iii)  a building intended for use as a plant for the manufacture of milk products, there are storage rooms large enough for the operation intended. (m)  receiving rooms for milk are enclosed and of sufficient size to permit freedom of movement in receiving, grading, sampling and handling of milk and, where applicable, the washing and sanitizing of tank-trucks in accordance with sections 40, 41, 42 and 43 and the washing of containers; (n)  plants receiving milk have a pump capable of unloading milk from a tank-truck; (o)  receiving rooms for milk have a door at least 3.7 metres wide and 4.3 metres high; and (p)  rodents and other vermin do not enter or remain on the premises.  R.R.O. 1990, Reg. 761, s. 77 (1); O. Reg. 202/19, s. 4; O. Reg. 61/22, s. 8 (1-4). (2) The construction of a building intended for use as a plant or an alteration to increase the incoming milk capacity of such a building shall be made so that, (a)  Revoked: O. Reg. 61/22, s. 8 (5). (b)  in the case of a plant purchasing milk from the marketing board, there is, subject to subsection (3), (i)  an enclosed receiving room, and (ii)  an enclosed tank-truck wash station that complies with sections 40, 41, 42 and 43. R.R.O. 1990, Reg. 761, s. 77 (2); O. Reg. 348/95, s. 14; O. Reg. 393/19, s. 1 (1); O. Reg. 61/22, s. 8 (5). (3) Clause (2) (b) does not apply to the construction or alteration of a building intended for use as a plant that purchases milk from the marketing board if, (a)  the maximum volume of milk to be received from the marketing board at the building to be constructed or altered will not exceed 7500 litres in any given day; and (b)  a pad is constructed so that a tank-truck can park on it when delivering milk and the pad meets the following requirements: (i)  the pad is capable of supporting tank-trucks without sagging or heaving, (ii)  the pad has a smooth surface that is impermeable to liquids, (iii)  the pad is adequately sized to allow access to the tank-truck for delivery of milk, and (iv)  the pad has, (A)  an adequate slope towards a drain which is capable of capturing any liquid accumulating on the pad during the normal course of delivery of milk, or (B)  a system adequate to prevent the escape into the environment of any liquids accumulating on the pad during the normal course of delivery of milk. O. Reg. 393/19, s. 1 (2). (4) The operator of a plant that is exempt under subsection (3) from the requirement of having an enclosed receiving room and an enclosed tank-truck wash station shall, (a)  ensure that the pad constructed in accordance with clause (3) (b) is maintained so as to continue to meet the requirements of that clause; (b)  have available for use during the delivery of milk from a tank-truck protections for openings into the tank-truck that are adequate to protect the milk in the tank from contamination; and (c)  ensure that the volume of milk received at the plant is not increased so as to exceed 7500 litres a day unless the plant is renovated to have an enclosed receiving room and an enclosed tank-truck wash station that complies with sections 40, 41, 42 and 43. O. Reg. 393/19, s. 1 (2). Equipment