OTAQ Staff Weigh Stricter Truck NOx Limit But Pruitt's Support Uncertain

Staff in EPA's Office of Transportation & Air Quality (OTAQ) are pursuing “necessary technical work” to review the agency's 2010 nitrogen oxides (NOx) emissions standard for heavy-duty trucks with an eye to potentially suggesting a stricter limit, but it is unclear whether Administrator Scott Pruitt would back any effort to tighten the limit. Chris Grundler, director of OTAQ within EPA's Office of Air & Radiation (OAR), told a May 23 meeting of the agency's Mobile Sources Technical Review Subcommittee (MSTRS)...