Orica leak lower than first thought: EPA

Lower levels of hexavalent chromium leaked out of Orica’s plant near Newcastle than were first reported last year, the NSW Environmental Protection Authority (EPA) says.

Plumes of the carcinogenic chemical escaped from the chemical giant’s ammonia plant at Kooragang Island for about 30 minutes on August 8.

About 70 homes in the nearby beachside suburb of Stockton were exposed to the harmful chemical.

But the authority said on Wednesday that new sample results “reflect a lower level of concentration of hexavalent chromium than originally reported in all but one sample and that one result remains in the low category”.

It was initially believed that between 10kg and 20kg of hexavalent chromium had been emitted, Orica said.

This figure is now believed to be one kilogram, with an estimated 35 grams to 60 grams affecting people in Stockton.

“These revised figures do not change the fact that we had an incident … that we deeply regret,” Orica’s chief executive Graeme Liebelt said in a statement.

“We have acknowledged that our response at the time was not what the community expected.”

The company and the state government were heavily criticised after the leak, with residents not notified of the August 8 leak until three days later.

NSW Health and an independent report commissioned by Orica have since found the leak posed no health risk to the public.

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