Petrol contains volatile organic compounds (VOCs) that evaporate in storage tanks. During unloading of petrol to an underground storage tank or refueling of a vehicle, petrol vapour in the tank will be displaced by the incoming petrol. Unless controlled, the petrol vapour will dissipate into the atmosphere. Major harmful effects of VOCs from petrol filling stations would include:
(a) Enhancing the formation of ozone and fine particulates in the atmosphere, thus causing smog,
In 1999, the Government introduced the Air Pollution Control (Petrol Filling Stations)(Vapour Recovery) Regulation to require petrol filling stations to install a system to recover VOC emissions during the unloading of petrol from petrol tankers into underground storage tanks (Phase I). To further control VOC emissions, the Regulation was amended in 2004, effective on 31 March 2005, to require stations to install a system to recover VOCs emitted during vehicle refueling (Phase II). Now, all the stations have already installed the Phase I and Phase II vapour recovery systems.
A vapour recovery system helps to collect petrol vapour released during unloading and refueling back to the petrol tanker and underground storage tank, respectively.
If a station has installed this vapour recovery system which passes the required tests, it will have the below certificate posted at the station. All the stations have already installed the vapour recovery systems.
Yes. The shape of the vapour recovery nozzle is different from those without. It has a vapour guard and holes at the nozzle spout to recover petrol vapour.
(a) You may download the relevant test methods specified in the Air Pollution Control (Petrol Filling Stations)(Vapour Recovery) Regulation at this link:
(b) Regarding the certificate, please take note that the form has been amended with effect from 1 April 2011. The certificate can be downloaded at this link .