CYANIDE TREATMENT AT MANUFACTURED GAS PLANT SITES OVERVIEW In May 2003, Evoqua Water Technologies was contacted by a large east coast utility for assistance in treating cyanide contamination from a former manufactured gas plant (MGP) location. The residual contamination at this site contained many organic compounds and heavy metal cyanide complexes that exceeded the discharge requirements to an adjacent river. In the early 1800 through the

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