1 dez 2015 ano - EPA makes the 2011 National Air Toxic Assessment public...

Descrição:

... That same month, the EPA asks Denka for more information in an attempt to confirm emissions estimated in the study. The national regulatory agency also asks for proof that the plant is in compliance with air permits issued under the Clean Air Act.

https://www.epa.gov/national-air-toxics-assessment/2011-nata-assessment-results