A CHEMICAL spill at Rio Tinto Alcan's Yarwun site on Tuesday resulted in a litre of nitric acid having to be mopped up.
A Rio Tinto spokesperson said the spill occurred in a contained area and no employees were affected, but emergency services were called in to help.
Meanwhile, smoke around Gladstone's CBD was caused by controlled burns.
A Queensland Fire communications spokesperson said the burns were happening across the state, and a 100ha burn by Rio Tinto Alcan Yarwun was also contributing to smoke in the region.
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