THE Mayfield Koppers plant has spent $1.5 million to install the second stage of a system designed to limit air emissions and odours.
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In August the NSW Environment Protection Authority ordered the plant to add better controls after a series of statutory notices.
The closed thermal oxidation system will take already wet scrubbed fumes from six scrubbers across the plant to one of two oxidisers where they are combusted.
Operations manager Nick Moretti said the completed system would almost entirely wipe out benzene emissions.
"As part of our pollution reduction programs, set down in our licence, we have been undertaking programs to progressively reduce emissions for more than a decade," Mr Moretti said.
"This new system means we will be well within current guidelines for benzene during normal operations and will further reduce odours from the plant."
The plant, which has spent $40 million on projects at the plant since 2008, received a clean-up notice after a July 2 incident that allegedly resulted in the release of odorous gases.
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