By Walter F. Roche Jr.
Tennessee environmental officials now say they are satisfied a Greene County chemical firm has remained in compliance with nitrous oxide emission limitations set in its state permits.
In a letter to US Nitrogen LLC, Bryan Parker, an environmental manager at the state Department of Environment and Conservation, said newly submitted test results for the last six months of 2020 show the emission limits were not exceeded at USN's nitric acid plant and its steam generating facility.
The Division considers the report technically corect and acceptable for a determination of compliance," Parker wrote in a letter sent today to US Nitrogen Plant Manager Dylan Charles.
Earlier TDEC officials had expressed concern that conflicting data from the company might have masked excessive emissions. Parker expressed those concerns in a two-page letter to Charles sent late last year.
There was no time during the reporting period when the company exceeded the nitrous oxide limits, Parker wrote in today's letter.
Parker also credits the ammonium nitrate manufacturer with compliance with the reporting requirements in the state permits.
US Nitrogen also achieved 95 percent operational availability for its emissions monitoring equipment, Parker concluded.
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