By Walter F. Roche Jr.
Tennessee environmental officials are seeking detailed information from a Greene County chemical firm on its request to ease air pollution limits during startups and shutdowns of its nitric acid plant.
In a letter sent last week to Dylan Charles, plant manager of US Nitrogen LLC, an official of the state Department of Environment and Conservation said the detailed data should be provided within 30 days.
The request comes after US Nitrogen reversed course and asked TDEC to develop a "source specific" amendment to the state implementation plan on the opacity limits for startups, and shutdowns of US Nitrogen's nitric acid plant.
US Nitrogen had previously asked TDEC to "hold off" on setting specific new limits for US Nitrogen.
In the letter Michelle Owenby, a TDEC director, said US Nitrogen should provide data on the recorded emissions levels during prior startups and shutdowns from Sept. 11 2016 to Feb. 23, 2018.
Charles requested the new state effort in December of last year, but the request was not made public untill January.
The data requested includes USN's definition of a startup and the actual duration of startups and the number of startups during the specified time period.
TDEC also wants to know the chemical composition of the emissions and the efforts US Nitrogen has made to minimize those emissions.
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