Previously, the ambient air standard
for polychlorinated biphenyls--the measurement of acceptable air quality--was 5 nanograms per cubic meter during a 24-hour period.
When scientists are trying to assess whether volatile pollutant levels in soil are safe, the levels are compared against the ambient air standard
As such, the pollutants should be listed by EPA as criteria pollutants, and ambient air standards
should be issued for them, the complaint said.
First, Ottinger refers to various ambient air standards
and the fact that there is "no consensus on what constitute [s] a safe or permissible level.
Ironically, about 127 million Americans still live in counties where air pollution levels exceed one or more of the six National Ambient Air Standards
(NAAQS), and politicians still debate whether the health-based regulation of air quality is hurting the economy and stymieing job growth despite evidence to the contrary.
The company also monitors in parts per million, while more protective provisions set for ambient air standards
in Louisiana are in parts per billion.
Ambient air standards
govern the amount of dangerous pollutants that are allowed in the air people breathe.
The United States Environmental Protection Agency (US EPA) sets national minimum criteria that govern states' clean air problems, including their ambient air standards
, the extent of states' monitoring and enforcement programs, the financial and legal resources granted to state clean air agencies, and so on.
In political terms, cleaner ambient air standards
are particularly important to regions like Southern California.
The state's implementation plan, or the CO SIP in EPA jargon, must demonstrate that all areas in the state can achieve national ambient air standards
for carbon monoxide by 1996.
Hardest hit will be those who are currently not in compliance with ambient air standards
for ozone levels.