On October 24, 2014, the Environmental Protection Agency (“EPA”) published its final rule documenting the failure of the California Air Resources Board (“CARB”) to submit a State Implementation Plan (“SIP”) revision containing measures to control California’s significant contribution to the nonattainment, or interference with maintenance, of the 2006 24 hour fine particulate matter (“PM2.5”) National Ambient Air Quality Standards (“NAAQS”) in other states (“Interstate Transport SIP”).
On June 18, 2012, the Environmental Protection Agency (“EPA”) posted in the Federal Register, Vol. 77, No. 117, 36342, its Final Rule adopting several new aircraft engine emission standards for oxides of nitrogen (“NOx”) for aircraft turbofan or turbojet engines with rated thrusts greater than 26.7 kilonewtons (kN), or in common parlance, commercial passenger and freighter aircraft normally used at airports across the United States. The rule applies only to the manufacture of new aircraft engines, not to retrofit of existing aircraft engines.
The EPA’s stated purpose in enacting the new rule is two-fold. First, NOx is strongly correlated with nitrogen dioxide (“NO2”) which is a “criteria pollutant” under the EPA’s National Ambient Air Quality Standards (“NAAQS”), and is an important precursor gas in the formation of ozone and secondary particulate matter (“PM2.5”) which are common air pollutants in urban areas where airports are often located. Second, the new rule will bring United States’ emissions standards into consistency with those established by the International Civil Aviation Organization (“ICAO”), see ICAO Annex 16, Vol. II, 2010 that the U.S. helped to develop and supports as part of the international process.
The rule contains six major provisions.
On Thursday, March 16, 2012, the Environmental Protection Agency (“EPA”) took the almost unprecedented step of publishing in the Federal Register a correction to its prior definition of “regulated new source review pollutant” (“Rule”) contained in two sets of Prevention of Significant Deterioration (“PSD”) regulations, 40 C.F.R. §§ 51.166 and 52.21, and in EPA’s Emissions Offset Interpretative Ruling, 40 C.F.R. Part 51, Appendix S, 77 Fed.Reg. 15,656. The purpose of the revision is to correct an “inadvertent error” dating back to the Rule’s promulgation in 2008 when the then-existing definition was changed to require that particulate matter emissions, both PM10 and PM2.5, representing three separate size ranges of particulates, must include “gaseous emissions, source or activity which condense to form particulate matter at ambient temperatures,” i.e., condensable particulate matter. See, e.g., 40 C.F.R. § 51.166(b)(49)(vi). Previously, EPA’s regulations only required the filterable fraction, not the condensable particulate matter, to be considered for new source review purposes. The 2008 change therefore imposed an unintended new requirement on State and local agencies and the regulated community.
A Federal Court has recently thrown open the door to potential civil challenges to both private and governmental sources of greenhouse gas emissions, based on the Federal common law of nuisance. For those who believe the Environmental Protection Agency (EPA) has acted too slowly in promulgating greenhouse gas regulation, civil actions are now possible at least in the Second Circuit. However, the Supreme Court may now scrutinize the Second Circuit’s decision. Based on a recent Fourth Circuit decision on a similar issue, the “Nine” may be tempted to follow in Moses’ footsteps and pare down the Second Circuit decision to apply only to greenhouse gas emissions from Federal projects.