In reply to Hon. M.J. ELLIOTT (13
August).
The Hon. DIANA LAIDLAW: The Minister for Environment and Heritage
has provided the following information.
Mining commenced at Brukunga in 1952, and the mine was closed
in 1972, with maintenance continuing for another one to two years. The
Government assumed responsibility for the mine in 1976, under the authority
of the then Minister for Mines and Energy, Hon. D.J. Hopgood. At the time,
the Government was paid $75 000 by the companies concerned in full and
final settlement and in so doing, discharged any future obligations.
The approximate cost to Government as a result of the pollution
problems at the mine is approximately $600 000 per annum.
Recent analysis undertaken as part of a water quality monitoring
program, at the Old Mount Barker mine site showed that heavy metal concentrations,
in particular cadmium, were above national guidelines.
Based on this information the EPA requested PIRSA, the department
now responsible for the site, to place signs along Dawesley creek as well
as send notices to land owners informing them that the water in the creek
is polluted and unsuitable for drinking, recreation, stock watering and
irrigation.
It is known that long-term exposure (through ingestion) to high
cadmium levels in humans can cause kidney dysfunction. Other effects, such
as osteomalacia (softening of the bones), can occur but at much higher
cadmium exposure levels. There is no evidence that cadmium causes cancer
when ingested.
Food and water can contribute to overall cadmium intake, with
food being the major contributor. It is important to reduce the overall
intake of cadmium from all sources, particularly food.
There is no evidence that people living in the vicinity of Dawesley
creek are suffering from cadmium related illnesses and therefore at this
time there is no reason to investigate whether or not cadmium levels have
been elevated in people living in the near vicinity of Dawesley Creek.
It is also worth pointing out that residents near the creek are unlikely
to be drinking from it, and they certainly would not since signage was
erected.
PIRSA has established a task force to address the immediate issues
relating to pollution in the creek and the possible long term rehabilitation
of the site. The task force will comprise of representa-tives from the
Environment Protection Agency, Health Commission, and PIRSA. Additionally,
PIRSA will continue to liaise with land care and Local Government on this
issue.
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