New Source Review Litigation
New Source Review litigation concerns whether a physical or operational change at an industrial facility triggered Clean Air Act pre-construction permitting requirements as a major modification.
The New Source Review program, including its Prevention of Significant Deterioration component for areas meeting air quality standards, requires major stationary sources to obtain a pre-construction permit and install modern pollution controls before undertaking a physical or operational change that would result in a significant net emissions increase. Whether a given project counts as a covered major modification, as opposed to routine maintenance, repair, or replacement that is exempt, is the recurring factual and legal battleground.
Emissions-increase determinations use an actual-to-projected-actual test that compares a facility's baseline actual emissions to its projected post-change emissions, netted against other contemporaneous increases and decreases at the source. Enforcement initiatives targeting power plants and refineries have generated extensive case law on how to characterize component replacements and efficiency upgrades under the routine maintenance exclusion.
Because NSR liability can require installation of costly emissions controls and can trigger penalties calculated per day of noncompliance going back years, the classification question carries outsized financial stakes relative to its technical narrowness. A Juricratic simulation lets a facility rehearse how uncertainty in the emissions-increase calculation and the routine-maintenance-exclusion argument interact to shape overall enforcement exposure.
How it actually shows up
NSR litigation typically follows an EPA or state enforcement initiative alleging that a facility undertook a major modification without the required pre-construction permit, with the dispute centering on emissions-increase calculations, the routine maintenance exclusion, and the applicable statute of limitations for civil penalties.
- What triggers New Source Review permitting?
- A physical or operational change at a major stationary source that is projected to cause a significant net increase in emissions of a regulated pollutant.
- What is the routine maintenance exclusion?
- An exemption from NSR permitting for repairs, replacements, and maintenance activities that are routine for the type of source involved, rather than a functional modification.
- How are emissions increases measured for NSR purposes?
- Typically by comparing baseline actual emissions before the change to projected actual emissions after it, netted against other contemporaneous emissions changes at the source.
This page is an educational explainer, not legal advice, and creates no attorney–client relationship. Juricratic is a simulation engine: every probability-like figure is a dial you set, not a calibrated prediction. Verify every rule, deadline, and figure against the authorities and orders that govern your matter.
Turn the concept into a modeled matter.
Juricratic makes every one of these ideas a live dial: model your case as a solvable game, then watch the optimal line and the settlement window move as the assumptions do.
Request access →