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NCDEQ issues air permit modification for Enviva facility

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An air permit modification has been issued for Enviva’s Sampson facility in Sampson County, North Carolina.

The North Carolina Department of Environmental Quality’s (NCDEQ) Division of Air Quality issued the final permit, which adds equipment to control emissions of volatile organic compound (VOC) and hazardous air pollutants (HAPs) from the existing pellet presses, pellet coolers, and the dry hammermills.

Once installed and operational, the controls will decrease the potential to emit VOCs and HAPs allowing the facility, which is currently a major source, to be reclassified as a minor stationary source.

Until the controls are operational, the facility – the third plant built by Enviva in North Carolina - will continue to be subject to the best available control technology emission limits and maximum achievable control technology requirements in the permit.

Division staff thoroughly reviewed the comments received on the draft permit during the public consultation. Monitoring and record-keeping activities are required, which include monthly facility-wide emissions calculations and semi-annual reports to ensure compliance with PSD minor and area source status.

The testing requirements for changes to softwood percentages or throughput from the previous permit are still in place to ensure controls are operating properly and that emissions do not exceed permitted limits. The overall facility throughput is not being modified.

Located near the towns of Faison and Clinton, the plant produces approximately 600,000 tonnes of pellets per year.