Louisiana Environmental Action Network v. EPA, No. 17-1257 (D.C. Cir. 2020)Annotate this Case
When the EPA promulgated the emission standard for pulp mill combustion sources in 2001, EPA addressed some but not all the hazardous air pollutants they are known to emit. In 2017, EPA conducted its first section 112(d)(6) of the Clean Air Act review and revision of the 2001 standard, but decided only to review the standard's limits on emissions of the toxics the standard already controlled, leaving unlimited several other hazardous toxics that the sources are known to emit but that were left out of the 2001 Rule. Petitioners challenged the 2017 Rule's failure to correct the standard's acknowledged under-inclusiveness during the section 112(d)(6) review.
The DC Circuit held that, because the Act necessitates section 112-compliant emission standards for each source category, and section 112(d)(6) requires EPA at least every eight years to review and revise emission standards "as necessary," EPA's section 112(d)(6) review of a source category's emission standard must address all listed air toxics the source category emits. Because the 2017 Rule failed to do this, the court granted the petition for review, remanding the rule without vacatur and directing the EPA to set limits on the listed air toxics that pulp mill combustion sources are known to emit but that EPA has yet to control. The court dismissed as moot the denial of the petition for reconsideration.