84Roof or cover for tanks commissioned before 1 July 2024

84 Roof or cover for tanks commissioned before 1 July 2024

84 Roof or cover for tanks commissioned before 1 July 2024

(1) A fixed roof and floating cover must be made of a material that is impervious to vapour.

(2) A floating roof must be made of metal.

(3) A floating cover or floating roof must at all times float on the surface of the volatile organic liquid stored in the tank and not rest on the floor of the tank.

(4) A floating roof or floating cover must have primary closure seals that close—

(a) spaces between the roof or cover and the walls of the large storage tank, and

(b) openings in the floating roof or fixed roof and floating cover, and

(c) gaps caused by equipment passing through the openings.

(5) A floating roof must have primary seals that are shielded from the weather by—

(a) moveable weather-shields that allow for the proper inspection of the seals, or

(b) secondary seals.

(6) Subsection (5) does not apply to a large storage tank until—

(a) 1 July 2030, or

(b) if a prescribed event occurs in relation to the storage tank before that date and on or after 1 July 2024, on the date on which the first prescribed event occurs.