"Bill 2" wrote in message
...

"John A. Weeks III" wrote in message
...
In article ,
wrote:

These aircraft perform no useful function and can make no
claim to even the remotest socially redeeming value that might justify
destruction of peoples lives.

Remember, it was a home-built plane that invented aviation in the
first place, and a home-built plane that carried our most recent
astronauts into space. General aviation is where most of our true
aeronautical advances are coming from.

Remember that most general aviation aircraft were built in the 70s using
technology from the 40s-50s, and their antique engines are burning leaded
gasoline.



Aviation fuel, 100LL, contains 2 grams of lead per gallon. Approximately
75% of this lead is emitted in the exhaust as lead particulates.

EPA Data:

Avgas 100LL contains about 2 grams of lead per gallon, and is typically the
most commonly used aviation gasoline"

"However, alkyl-lead compounds combine with other compounds during the
combustion process to form lead halides (e.g., PbBrCl, 2PbBrClCNH4Cl, etc.)
that are subsequently emitted as microparticulates in exhaust."

"Additionally, through the combustion process, alkyl-lead in gasoline is
converted to lead halides and exhausted into the air where it can be
inhaled. These lead halides create the potential for exposure to lead
through ingestion of soil or dust containing lead, and ingestion of
lead-contaminated food or water."
http://www.epa.gov/pbt/pubs/Alkyl_le...plan_final.pdf

"Lead poisoning can result from the ingestion or inhalation of inorganic
lead compounds emitted as exhaust through the combustion process (as a
direct result of the use of alkyl-lead in gasoline)."
http://www.epa.gov/pbt/alkyl.htm

However, as gasoline containing alkyl-lead is still currently being used as
fuel (particularly for race cars and airplanes), certain subpopulations may
remain at risk. Lead particles can remain airborne for some time following
the initial introduction into the atmosphere. Therefore, residents in the
vicinity of race tracks and general aviation airports where leaded gasoline
is still being used as fuel may have an increased risk of lead exposure."
http://www.epa.gov/pbt/pubs/Alkyl_le...plan_final.pdf

....However, the Agency is concerned about any sub-populations that may
remain at risk, for example, individuals exposed at racetracks or general
aviation airports. The Agency also recognizes that these remaining risks
should not be taken lightly. EPA does not have the authority under the Clean
Air Act to regulate the use of leaded gasoline for the racing industry, and
the authority to regulate aircraft fuel lies with the Federal Aviation
Administration.
http://www.epa.gov/fedrgstr/EPA-AIR/...-23/a18588.htm