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.


Continue Reading EPA Issues “Amendment” to Definition of Condensable Particulate Matter as Regulated New Source Review Pollutant

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.


Continue Reading Preemption Rears its Head Again in Federal Common Law and Nuisance Climate Change Challenge