Sorry for the delay in responding to you, we had to confer with our colleagues at APA for further information.
We understand your concern about the use of chemicals. APA takes the spillage of liquid odorant very seriously as it has the ability to affect public safety.
APA has dozens of odorant injection facilities across the country and have a standing contract with a supplier for odorant delivery. That contractor is the same contractor that is designing and supplying the odorant equipment for the Crib Point Pakenham pipeline.
To answer your specific questions, APA use a chemical called Spotleak 1005.
The odorant is supplied on an isotainer, specially designed for the transport of flammable liquids, delivered on a truck. The truck will park in a specifically designed truck bund that can hold all of volume of liquid supplied in an isotainer if a leak should occur.
The transfer of liquid from the isotainer to the storage vessels is via a pump and specialised hoses. The pump and hoses remain the property of APA to control the integrity of hose connections and performance of the pump. The transfer process uses a closed loop system where the liquid is pumped into the storage and the vapour is returned back to the isotainer to remove the need to vent or flare the vapour.
The odorant liquid is stored in vessels that are positioned in a separate bund to the truck bund and can hold all the liquid from a spill.
Rain water collected in the bunds is not released before it is checked by a technician and is a manual process. So any leaks that occur are not released into the environment.
Odorant spills are rare but we must prepare for any worst case scenario. It will be cleaned up with spill kits that are located at Crib Point. The materials used during the clean up will be disposed of at an appropriate disposal location.
The odorant transfer pump, odorant injection pump and all odorant handling materials are contained in a separate building at Crib Point. This building is constantly purged with air to ensure no smell escapes the building. All of the expelled air from the building is pushed through a series of drums of activated carbon that extract the smell.
APA also carry Mercaptan Odorant Neutraliser (MON) to clean-up the smell at Crib Point, in case of small leak.
There are a number of regulators who will be involved to ensure we meet the highest safety standards. These regulators include:
- the pipeline regulation unit at Department of Environment, Land, Water and Planning (DELWP)
- Energy Safe Victoria
- the Australian Maritime Safety Authority (AMSA)
- Port of Hastings Development Authority
- Worksafe Victoria
- Victorian Regional Channels Authority (VRCA) and the Harbour Master
- Transport Safety Victoria (TSV) and Maritime Safety Victoria and
- the Office of Transport Security (Cth).