...Zinifex has started testing all tanks in the Gulf of Carpentaria town of Karumba...tests by the local council of 10 tanks in the town...revealed three had unusually high levels of lead, zinc and cadmium..."There is no indication at this stage as to what might be the cause of these levels"... [Environmental Protection Agency Acting Premier] Ms [Anna] Bligh said...The company has also offered Karumba residents free blood testing for lead levels..."There are several things it could be, one of which is probably most likely dust from our site,'' he [Zinifex spokesman Matthew Foran] said...