SLUDGE-LIKE sediment containing lead, copper, chromium and mercury is washing up onto river-side rocks in East Fremantle, activists say. Concerned residents calling themselves People Against Dredging say independent testing by a Perth lab found lead, copper, chromium, Tributyltin (TBT) - banned in Australia since 2008 - and mercury in the thick cement-like deposits.
A group spokeswoman says the toxins have been washing ashore since dredging to expand Fremantle Harbour began in January.
The group took samples from near Stirling Bridge in East Fremantle and had them tested by an accredited Perth chemistry lab.
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Update 1 March: Sampling finds alarming levels of lead in Fremantle
Air and dust sampling for lead in the Port of Fremantle has found alarming levels of the toxin with readings up to 40 times higher than baseline levels.
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