By Walter F. Roche Jr.
US Nitrogen LLC has been granted coverage from state regulators for Tennessee's Storm Water Multi-Sector Permit program.
Notice of the approval was sent today to Dylan Charles, US Nitrogen's plant manager by the Tennessee Department of Environment and Conservation.
"We are hereby notifying you that your facility is covered under this general notice," the notification reads.
According to TDEC new requirements will be added on to US Nitrogen's existing stormwater runoff permit.
The new permit is effective until June 30. 2022 and is retroactive to July 1, 2020.
TDEC noted that the U.S. Environmental Protection Agency has recently filed notice of changes in its stormwater pollution prevention program under the federal Clean Water Act. TDEC described the new standards as "fundamentally different" from the old ones.
US Nitrogen is subject to those EPA rules applying to stormwater runoff from industrial activities.
Previous annual reports from US Nitrogen on stormwater runoff have shown excess nitrates.
In its most recent report the company reported that while the benchmark level of nitrates is .68 milligrams per liter, the level in the company tests of stormwater runoff was 1.18 milligrams per liter.
US Nitrogen said it was investigating the cause or source of the nitrates and suspected it was a trench installed in 2019 to collect stormwater from the rail loading area.
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