By Walter F. Roche Jr.
Permit limits at the Midway complex of US Nitrogen and two other firms exceeded the permit limits 129 times during a nine month period, according to the Tennessee Department of Environment and Conservation.
In a letter to Linde Inc., one of the three firms at the Greene County complex, a TDEC official reported that the violations were noted during a July review of Linde Inc. records.
According to TDEC Manager Amanda Davis, the excess electrical conductance occurred on cooling towers used at the facility as part of a carbon dioxide liquefaction process.
The company's own monitoring data showed the 129 violations occurred between Jan. 30, 2020 and Oct. 13, 2020.
Davis wrote that there were no violations after Oct. 13 when the company received approval for an increase in the allowable conductance. The daily average limit of 803.5 microsiemens was increased effective Oct. 14 to 7,100 microsiemens.
"You have violated the Tennessee Air Pollution Regulations," the letter dated today states.
Davis told company officials that they have 20 days to file an appeal if they dispute the findings.
The initial permit was issued to Praxair, US Nitrogen and Yara North America but Praxair was later merged into Linde, a company that also produces liquid carbon dioxide for use in the beverage industry<.
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