925 F.3d 490
D.C. Cir.2019Background
- EPA amended Part 58 (ambient air monitoring) in 2016 to tighten procedures for changes to annual monitoring network plans, permit limited reductions in PM2.5 sampling frequency, and revise certain PSD quality-assurance requirements.
- Sierra Club petitioned for review, asserting (1) monitoring network plans must be reviewed as part of SIPs under Clean Air Act procedures, (2) EPA unlawfully authorized reductions in PM2.5 sampling frequency, and (3) EPA failed to respond to adverse comments about PSD quality-assurance relaxations.
- EPA had adopted a non-SIP review approach for annual monitoring plans no later than its 2006 rulemaking and continued that approach in the 2016 rule.
- The sampling-frequency change allows Regional Administrators, after case-by-case analysis, to approve reductions from 1-in-3 to 1-in-6 days (or seasonal sampling) where reductions won’t compromise NAAQS implementation.
- Sierra Club offered declarations identifying three monitors near its members as potentially eligible for reduced sampling; EPA evidence showed those monitors have historically low PM2.5 values.
- EPA acknowledged it misstated the administrative record by saying it received only favorable comments about PSD changes, but explained that it had in fact considered the substantive concerns raised.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether annual monitoring network plans must be reviewed under SIP procedures | Sierra Club: Monitoring plans are part of SIPs and thus subject to SIP notice-and-comment and review procedures | EPA: Annual monitoring plans have long been treated outside SIP procedures; 2006 rule adopted that approach and 2016 rule merely continued it | Dismissed as time‑barred: challenge to SIP-status stems from EPA's 2006 action and was untimely; court raises jurisdictional bar sua sponte and dismisses that claim |
| Whether EPA permissibly allowed case-by-case reductions in PM2.5 sampling frequency | Sierra Club: Reductions increase risk of undetected PM2.5 spikes; EPA failed to consider that risk adequately | EPA: Reductions are discretionary, limited, require Regional Administrator findings considering data quality and nearby monitors; safeguards protect NAAQS implementation | Dismissed for lack of standing: Sierra Club failed to provide evidence showing substantial probability its members will be harmed by these reductions (speculation chain too attenuated) |
| Whether EPA unlawfully failed to respond to adverse comments on PSD quality-assurance changes | Sierra Club: EPA stated (incorrectly) no adverse comments were received, so it did not respond to significant points | EPA: Despite the misstatement, the Final Rule shows it considered and addressed the substantive concerns raised | Denied on the merits: EPA did consider relevant factors and responded substantively; Sierra Club did not press a substantive inadequacy argument sufficiently |
Key Cases Cited
- Gonzalez v. Thaler, 565 U.S. 134 (issue‑preclusion of untimely petitions and court's duty to raise jurisdictional defects)
- Medical Waste Inst. & Energy Recovery Council v. EPA, 645 F.3d 420 (timeliness rule for petitions tied to first agency use of an approach)
- Lujan v. Defenders of Wildlife, 504 U.S. 555 (standing requirements; injury‑in‑fact and evidentiary support)
- Sierra Club v. EPA, 292 F.3d 895 (associational standing standards and evidentiary showing for members)
- Sierra Club v. EPA, 895 F.3d 1 (court’s precedents on jurisdictional timing and review)
- Am. Road & Transp. Builders Ass’n v. EPA, 588 F.3d 1109 (assessing agency context to determine whether agency reopened an issue)