They believe that EPA has shown and determined that lead
emissions from aircraft engines fueled by leaded
aviation gasoline constitute the largest single
contributing source to overall airborne lead pollution.
In so doing, EPA has established that emissions from
aircraft using leaded aviation gasoline cause, or
contribute to, air pollution which may reasonably be
anticipated to endanger public health or welfare. There
is no need for further study. EPA has all of the
evidence it needs to make an endangerment finding.
Avgas (aviation gasoline), is an aviation fuel used in
spark-ignited internal-combustion engines to propel
aircraft. Avgas is distinguished from mogas (motor
gasoline), which is the everyday gasoline used in motor
vehicles and some light aircraft. Unlike mogas, which
has been formulated since the 1970s to allow the use of
platinum-content catalytic converters for pollution
reduction, avgas contains tetraethyl lead (TEL), a toxic
substance used to prevent engine knocking (detonation).
Oregon Aviation Watch (“OAW”) is a non-profit
organization dedicated to research, education and
advocacy on behalf of the public interest and public
welfare regarding aviation issues.
Physicians for Social Responsibility (“PSR”) is the
largest physician-led nonprofit organization in the U.S.
working to slow, stop and reverse global warming and
toxic degradation of the environment. Founded in 1961,
PSR has a national network of 50,000 health
professionals and concerned citizen members and
e-activists, twenty-five PSR chapters in nineteen
states, and roughly thirty student PSR chapters at
medical and public health schools. In 1992, recognizing
that new dangers threaten our communities, PSR expanded
its mission to include environmental health.
Petitioner Friends Of The Earth is a tax-exempt
environmental advocacy organization founded in 1969 and
incorporated in the District of Columbia, with offices
in Washington, DC and Berkeley, As of April 2014,
Friends Of The Earth had more than 23,600 members across
all 50 states in the United States and more than 235,000
activists. Friends Of The Earth is part of Friends of
the Earth International, a federation of grassroots
groups working in 74 countries on today’s most urgent
environmental and social issues.