Air Enforcement: Louisiana Department of Environmental Quality and Norco Naphtha Production Facility Enter into Settlement Agreement
November 13, 2026
By:
Walter G. Wright
Category:
Arkansas Environmental, Energy, and Water Law
Arkansas Environmental, Energy, and Water Law
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The Louisiana Department of Environmental Quality (“LDEQ”) and Diamond Green Diesel LLC (“DGD”) entered into a July 9th Settlement Agreement (“SA”) addressing alleged violations of an air permit. See SA-AE-26-0057.
The SA provides that DGD owned and/or operates a green diesel, light end gas and LPG/naphtha production facility located in Norco, Louisiana.
LDEQ is stated to have conducted inspections of the facility on November 20, 2024, and November 12, 2025.
The facility operates pursuant to Clean Air Act Title V Air Permits.
The SA alleges the following violations:
- Failure to operate the ribbon blender in compliance with the emission rates established in the Title V Permit.
- Failure to operate EQT 0036 in compliance with the emission rates established in the Title V Permit.
- Failure to follow Recognized And Generally Accepted Good Engineering Practices for inspection and testing procedures.
- Failure to submit the 2023 Annual Criteria Pollutant Emission Inventory and associated Certification Statement by the 2024 deadline.
- Failure to submit the 2023 Annual Toxic Air Pollutant Emission Inventory and associated Certification Statement by the 2024 deadline.
DGD denies that it committed any violations.
A civil penalty of $5,500 is assessed.
A copy of the SA can be found here.
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