New South Wales Repealed Regulations

This legislation has been repealed.

PROTECTION OF THE ENVIRONMENT OPERATIONS (CLEAN AIR) REGULATION 2021 - REG 65

65 Control equipment for large storage tanks

(1) This clause applies to any large storage tank situated anywhere within the Sydney, Newcastle or Wollongong Metropolitan Area.

(2) The following control equipment is required to be fitted to any large storage tank to which this clause applies--

(a) a drainage system comprising a small sump or tundish fitted under each water draw-off valve and connected to a totally enclosed drain,

(b) if the volatile organic liquid stored in the tank has a vapour pressure of or below 75 kilopascals--

(i) a floating metal roof that, under normal operating conditions, floats on the surface of the liquid, or

(ii) a floating cover constructed of material impervious to vapour that, under normal operating conditions, floats on the surface of the liquid inside a fixed roof, or

(iii) a vapour disposal or recovery system of the kind referred to in subclause (6),

(c) if the volatile organic liquid stored in the tank has a vapour pressure above 75 kilopascals, a vapour disposal or recovery system of the kind referred to in subclause (6).

(3) Subclause (2)(a) does not apply in the case of tanks used for the storage of volatile organic liquid, other than crude petroleum, received by tank-to-tank transfer from other storage tanks.

(4) A floating roof or cover referred to in subclause (2)(b) must be constructed so as to prevent the escape of vapour through the roof or cover and so that--

(a) vapour beneath the floating roof or cover is contained by skirt plates situated near the edges of the roof or cover and surrounding any openings in the roof or cover or by similar means, and

(b) the roof or cover is equipped with one or more closure seals to close the spaces between the roof or cover and the tank walls and between any openings in the roof or cover and any equipment passing through those openings, and

(c) seals on floating roofs are shielded from the weather, and

(d) weather-shields are moveable to permit proper inspection of seals.

(5) The level of volatile organic liquid in a large storage tank that is fitted with a floating roof or cover referred to in subclause (2)(b) must be maintained, during normal operating conditions, at a depth sufficient to prevent the supports of the floating roof or cover from resting on the floor of the tank.

(6) A vapour disposal or recovery system referred to in subclause (2)(b) or (c) must be constructed so that the vapour emitted from the tank--

(a) is incinerated, so that the total concentration of unburnt vapour emitted to the atmosphere does not exceed 1.5 grams per cubic metre of the gases resulting from the incineration process, or

(b) is recovered, so that the total concentration of unrecovered vapour emitted to the atmosphere during any period of 4 hours does not exceed 110 milligrams per litre of volatile organic liquid passing into the tank during that period.

(7) The total concentration of unburnt vapour referred to in subclause (6)(a) is to be determined as set out in TM-19, the total concentration of unrecovered vapour referred to in subclause (6)(b) is to be determined as set out in TM-20 and the calculation of the vapour pressure of volatile organic liquid stored in tanks is to be carried out in accordance with TM-21.

(8) Subclauses (6) and (7) do not apply to large storage tanks on scheduled premises, within the meaning of Part 5, that belong to Group 6, within the meaning of that Part.