WASHINGTON Federal and state authorities are investigating the potential health risks to kitchen workers of being exposed to diacetyl, an artificial butter flavoring chiefly used in popcorn. Officials from the National Institute for Occupational Safety and Health took samples of cooking oils and sprays used in kitchens serving the New York offices of JPMorgan Chase and Goldman Sachs. The facilities are operated by Philadelphia-based Aramark.NIOSH also plans to repeat similar tests at ...

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