World Water Day on March 22 encouraged widespread reflection on worsening water depletion and pollution problems around the world. As the driest state in the driest
continent, South Australia is the canary in the coal mine. But while many South
Australians are pulling their weight by reducing water consumption and
installing rainwater tanks, some industries are pulling in the opposite
direction.
The
uranium mining industry is perhaps the most egregious example. The daily
extraction of about 35 million litres of Great Artesian Basin water for the
Olympic Dam uranium/copper mine has adversely affected a number of precious
Mound Springs – unique habitats which support rare and delicate micro flora and
fauna, some species of which are unique to a particular Mound Spring.
BHP
Billiton pays nothing for its massive water take for the Olympic Dam mine
despite recording a $17.7 billion profit in 2007-08. That arrangement is
enshrined in the Roxby Downs Indenture Act 1982 – as anachronistic a piece of
legislation as you’re ever likely to see.
In
February 2007, then Prime Minister John Howard wrote to state Premiers seeking
their agreement "to establish proper entitlements, metering, pricing and
reporting arrangements for water extracted from the Great Artesian Basin."
Asked whether his proposed new arrangements would apply to Olympic Dam, Mr
Howard said: "Everybody’s got to make a contribution to solving this
problem." But within days, he voiced support for BHP Billiton’s
"right" to free water from the Artesian Basin. In other words,
everyone except BHP Billiton has to make a contribution to solving this problem.
As
The Advertiser noted in a November
2005 Editorial, it is “essential … to safeguard the artesian basin water
supplies”. To that end, most users are subject to the Great Artesian Basin
Management Plan. But BHP Billiton is a law unto itself – its Olympic Dam mine is
not subject to the Management Plan and also enjoys exemptions from the SA Natural
Resources Act 2004 and the Environment Protection Act 1993.
Another
problem at Olympic Dam concerns the liquid tailings dams which are constantly
expanding as water is turned into liquid waste. In 2005 it was revealed that over
100 bird deaths were recorded in a four-day period – the birds had drunk liquid
tailings waste from the mine. Ongoing seepage from tailings dams are a further
concern. Last Monday (March 23), photos taken by an Olympic Dam mine worker
were released clearly showing radioactive
tailings liquid leaking from the
so-called rock ‘armoury’ of a tailings dam. The leaks were ongoing for at least
eight months and probably amounted to several million litres, but were not
publicly reported at all. Serious questions must be raised as to BHP Billiton’s
capacity to safely manage radioactive tailings if, as planned, tailings
production increases seven-fold to 70 million tonnes annually and water
consumption increases to over 150 million litres daily (over 100,000 litres
every minute).
BHP
Billiton proposes continuing with its water take from the Artesian Basin and
also building a desalination plant in the Upper Spencer Gulf to provide an
additional 120 million litres daily. The proposed desalination plant has raised
concerns over its impacts on marine species and fishing industries – in
particular from the discharge of brine. The Upper Spencer Gulf is a low
flushing fragile marine environment unsuited to siting a desalination plant and
BHP Billiton’s preferred site at Port Bonython is the breeding ground of the Charismatic
Giant Australian Cuttle Fish.
In-situ
leach (ISL) uranium mining is used at the Beverley uranium mine and is the
mining method proposed for use at other SA mines including Oban, Beverley Four
Mile and Honeymoon. ISL involves pumping acid into an aquifer, dissolving the
uranium ore and other heavy metals and pumping the solution back to the
surface. After separating the uranium, liquid radioactive waste – containing
radioactive particles, heavy metals and acid – is simply dumped in groundwater.
From being inert and immobile in the ore body, the radionuclides and heavy
metals are now bioavailable and mobile in the aquifer.
Proponents
of ISL mining claim that ‘attenuation’ will occur over time – that the groundwater
will return to its pre-mining state. However there is considerable scientific
uncertainty about the future of ISL-polluted groundwater and uncertainty about
the timeframe for attenuation if it does occur. A 2003 Senate References and
Legislation Committee report recommended banning the discharge of radioactive
liquid mine waste to groundwater. The Rann Government responded by
commissioning a study which had all the hallmarks of a whitewash yet still
acknowledged that attenuation is "not proven" and could only cite a
period of "several years to decades" for it to occur. Yet the
companies proposing to use ISL mining at Beverley Four Mile want to absolve
themselves of any future responsibility for the site just seven years after
they have finished mining. The future of ISL mining is plain to see –
short-lived mines leaving South Australians with a lasting legacy of polluted
aquifers.
The
Australian Nuclear Free Alliance – which brings together Aboriginal custodians
with representatives from environmental, medical and public health groups – is
calling on the Rann Government to initiate an independent public inquiry into
the impacts of uranium mining on SA’s water resources. This inquiry ought to
take place in the 12 months leading up to next year’s state election. It would
provide political parties with an opportunity to demonstrate their resolve to
properly regulate the state’s dwindling water resources and to address the
contradiction between corporate water profligacy and the responsible attitude
and actions of ordinary South Australians.
Dr Jim Green is Friends of
the Earth’s national nuclear campaigner and a member of the Australian Nuclear
Free Alliance’s national committee.