Following its final rule for light-duty vehicles issued at the end of 2021, this past spring, the U.S. Environmental Protection Agency (“U.S. EPA”) proposed new emission standards for heavy-duty highway vehicles and engines. ...more
Operating conditions during periods of startup, shutdown, and malfunction (SSM) are not normal and often result in unrepresentative emissions that exceed permitted limitations. Originally published in The Natural Gas &...more
NEW REGULATORY DEVELOPMENTS - Federal - National Ambient Air Quality Standards for Lead, 40 C.F.R. Part 50 EPA is proposing to retain the current national ambient air quality standards for lead without revision....more
The U.S. Environmental Protection Agency (EPA) recently proposed revising the national air quality standard for ozone, the key pollutant in smog and regional haze. EPA acknowledges that the rule will cost billions of dollars...more
On November 25, 2014, the Environmental Protection Agency (“EPA”) proposed to reduce both the primary and secondary National Ambient Air Quality Standards (“NAAQS”) for ground-level ozone from 75 parts per billion (“ppb”) to...more